I want to build this project with Android Studio at launching, but take a error. Stacktrace is here
This problem occurs when there are multiple JDKs installed in your system, I had the same issue as I had mistakenly installed oracle-jdk-9 and Android studio requires oracle-jdk-8
If you are using Ubuntu you can install jdk-8 from this question.
So, Make following changes as shown below:
Press ctrl+shift+alt+s that will open project structure which can also be opened from
File -> Project Structure
And then change JDK Location where you may have installed JDK 8
this because your classpath build tools in build.gradle root project is deprecated update like this for new android studio 3.2.0
buildscript {
dependencies {
classpath 'com.android.tools.build:gradle:3.2.0-alpha14'
}
and after that update your minimum sdk and build tools to latest and no problem again
I had the same problem. I had installed Java 8 and Java 9.
I set JAVA_HOME to Java 8, but Gradle was using Java 9.
I changed the JDK in File->Project Structure to Java 8 and it worked.
JAVA 9 has forcefully taken over the JAVA_HOME to itself.
after installing java9 you will find
# java -version
java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)
So instead of uninstalling java 9 let us point the JAVA_HOME back to java 8
First find out the Android studio embeded JRE location
and add an entry in ~./bash_profile at last
export JAVA_HOME="/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home"
# source ~/.bash_profile
# java -version
java version "1.8.0_151"
Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)
source
http://scalebean.blogspot.com/2018/01/fix-gradle-could-not-initialize-class.html
Changing the JDK in Android Studio to point back at 8 didn't work for me. I uninstalled Java 9 and this solved the issue.
One simple solution:
React-Native isn't compatible with Java 9 or Java 10
Resolve this issue by simply downgrading to Java 8
Go to build.gradle,
and make sure your gradle dependencies up to date.
For Android studio 4.2.2
dependencies {
classpath 'com.android.tools.build:gradle:4.2.2'
.........
.........
}
If you have several Javas in Ubuntu, you can
sudo update-alternatives --config java
sudo update-alternatives --config javac
to select the Java 8 that Android and Gradle need.
If anyone is having issues with IntelliJ IDEA, go to File -> Project Structure (or press Ctrl + Alt + Shift + S) and remove all JDK 9 entries. JDKs are marked under Platform Settings -> SDKs with a folder behind a tiny blue cup of coffee.
I tried adding the correct path to JDK 1.8 but IntelliJ IDEA will default back to JDK 9 for whatever reason. Unfortunately, I need JDK 9 for other projects, so uninstalling it would be too much of a hassle. If you need to use JDK 9 for another project (like I do), you can still add a JDK 9 entry via the same menu and then remove it again when required.
If the Problem Persists, just import the gradle to Android Studio and build the file inside the Android Studio.
Android Studio automatically handles gradle and sdk problems.
After successful build you can also try running the app via react-native run-android in the
Command Prompt. Hope this Helps.
This was the only fix that fixed this issue.
I tried all the above answers but problem persisted
Related
I am working on an android application using Kotlin. I am running a kotlin linter through command line ./gradlew klint.
But it gives me an error:
Gradle 4.4 requires Java 7 or later to run. You are currently using Java 6.
When I check the project structure, I am using the embedded JDK.
I also updated android studio to latest version. I do not know how to update the embedded JDK to latest version.
java version
"1.6.0_65" Java(TM) SE Runtime Environment (build 1.6.0_65-b14-468) Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-468, mixed mode)
which java - /usr/bin/java
echo $PATH - /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/username/Library/Android/sdk/platform-tools
echo $JAVA_HOME - empty
A copy of the latest OpenJDK comes bundled with Android Studio 2.2 and higher, and this is the JDK version we recommend you use for your Android projects.
https://developer.android.com/studio/intro/studio-config.html#jdk
This however, is only for building your apps within Android Studio, not from the terminal with gradlew, otherwise, it'll use whatever is on your OS's $PATH variable.
In order to use the embedded JDK, you at least need to set JAVA_HOME, for example on Linux/Mac,
$ export JAVA_HOME=/path/to/AndroidStudio/jdk # TODO: Find this
$ ./gradlew
My recommendation, however, is to use the mechanism for your OS for installing Java.
For easy Java library management (on Linux & Mac), you can try using sdkman
gradle.properties can be updated to point to the embedded JDK that comes with Android Studio in Mac OS:
org.gradle.java.home=/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home
The issue is resolved by adding :
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin
at the start of the PATH variable . What i have found is that: There are three java locations.
Java that comes with mac (/usr/bin/java)
Java downloaded from oracle . ( /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin)
Java embedded with Android Studio (/Applications/Android\ Studio.app/Contents/jre/jdk/Contents/Home/bin/)
In my case the gradlew was always using the java from MAC (point number 1).
So when i added the " java dowloaded from oracle (point 2)" at the start of path variable it started using the one from oracle and my gradlew command ran.
This question already has answers here:
How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version
(51 answers)
Closed 6 years ago.
Pictures:
Command Prompt showing versions
Picture of error
Hello.java
import java.applet.Applet;
import java.awt.*;
public class Hello extends Applet {
// Java applet to draw "Hello World"
public void paint (Graphics page) {
page.drawString ("Hello World!", 50, 50);
}
}
Hello.html
<HTML>
<HEAD>
<TITLE>HelloWorld Applet</TITLE>
</HEAD>
<BODY>
<APPLET CODE="Hello.class" WIDTH=300 HEIGHT=150>
</APPLET>
</BODY>
</HTML>
Error
Hello : Unsupported major.minor version 52.0
What may the problem be?
The issue is because of Java version mismatch. Referring to the JVM specification the following are the major versions of classfiles for use with different versions of Java. (As of now, all versions support all previous versions.)
Java SE version
Major version
1.0.2
45
1.1
45 (Not a typo, same version)
1.2
46
1.3
47
1.4
48
5.0
49
6
50
7
51
8
52
9
53
10
54
11
55
12
56
13
57
14
58
15
59
16
60
These are the assigned major numbers. The error regarding the unsupported major.minor version is because during compile time you are using a higher JDK and a lower JDK during runtime.
Thus, the 'major.minor version 52.0' error is possibly because the jar was compiled in JDK 1.8, but you are trying to run it using a JDK 1.7 environment. The reported number is the required number, not the number you are using. To solve this, it's always better to have the JDK and JRE pointed to the same version.
In IntelliJ IDEA,
Go to Maven Settings → Maven → Importing. Set the JDK for importer to 1.8.
Go to Maven Settings → Maven → Runner. Set the JRE to 1.8.
Go to menu File* → Project Structure → SDKs. Make sure the JDK home path is set to 1.8.
Restart IntelliJ IDEA.
Another approach which might help is by instructing IntelliJ IDEA which JDK version to start up with.
Go to: /Applications/IntelliJ\ IDEA\ 15\ CE.app/Contents/Info.plist
and replace the JVM version with:
<key>JVMVersion</key>
<string>1.8*</string>
The smart way to fix that problem is to compile using the latest SDK and use the cross compilation options when compiling. To use the options completely correctly requires the rt.jar of a JRE (not JDK) of the target version.
Given the nature of that applet, it looks like it could be compiled for use with Java 1.1 meaning you'd use javac -target 1.1.
You will need to change your compiler compliance level back to 1.7 in your IDE.
This can be done in the preferences settings of your IDE. For example, in Eclipse go to menu Windows → Preferences, select Java, and expand it. Then select Compiler and change the compliance level to 1.7. I am sure this will work from there.
You must run and compile your application with the same version of Java.
If you're using Eclipse you should do 2 things:
In Eclipse, click on "Window > Preferences", and in the window that appears, on the left side, under "Java", click on "Installed JREs", click on "Add..." and navigate to the folder that contains the JDK.
Right-click on your project and click on "Properties", in the window that appears, on the left side, click on "Java Compiler" and uncheck "Use compliance from execution environment on the Java Build Path", this allows you to choose in the the list "Compiler compilance level" the same version that you set in the previous step.
You need to upgrade your Java version to Java 8.
Download latest Java archive
Download latest Java SE Development Kit 8 release from its official download page or use following commands to download from the shell.
For 64 bit
# cd /opt/
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u51-b16/jdk-8u51-linux-x64.tar.gz"
# tar xzf jdk-8u51-linux-x64.tar.gz
For 32 bit
# cd /opt/
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u51-b16/jdk-8u51-linux-i586.tar.gz"
# tar xzf jdk-8u51-linux-i586.tar.gz
Note: If the above wget command doesn’t not work for you, watch this example video to download the Java source archive using the terminal.
Install Java with alternatives
After extracting the archive file, use the alternatives command to install it. The alternatives command is available in the chkconfig package.
# cd /opt/jdk1.8.0_51/
# alternatives --install /usr/bin/java java /opt/jdk1.8.0_51/bin/java 2
# alternatives --config java
At this point Java 8 has been successfully installed on your system. We also recommend to setup javac and jar commands path using alternatives:
# alternatives --install /usr/bin/jar jar /opt/jdk1.8.0_51/bin/jar 2
# alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_51/bin/javac 2
# alternatives --set jar /opt/jdk1.8.0_51/bin/jar
# alternatives --set javac /opt/jdk1.8.0_51/bin/javac
Check installed Java version
Check the installed version of Java using the following command.
root#tecadmin ~# java -version
java version "1.8.0_51"
Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)
Configuring Environment Variables
Most of Java-based applications use environment variables to work. Set the Java environment variables using the following commands:
Setup JAVA_HOME Variable
# export JAVA_HOME=/opt/jdk1.8.0_51
Setup JRE_HOME Variable
# export JRE_HOME=$JAVA_HOME/jre
Setup PATH Variable
# export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
Note that the change to the PATH variable put the new Java bin folders first so that they override any existing java/bins in the path. It is a bit sloppy to leave two java/bin folders in your path so you should be advised to clean those up as a separate task.
Also, put all above environment variables in the /etc/environment file for auto loading on system boot.
I had the same problem... a JDK and plug-in version conflict.
I compiled using 1.8 ... the latest one, and that message started to appear.
So I've searched for the JRE 7 (http://www.oracle.com/technetwork/java/javase/downloads/server-jre7-downloads-1931105.html)... and installed it... again...
Now 1.8 and 1.7 in the same computer.
Using NetBeans, and compiling, and targeting to version 1.7, fixed my problem.
If you have a problem in Android Studio and you have installed Android N, change the Android rendering version with an older one and the problem will disappear.
If you're using the NetBeans IDE, right click on the project and choose Properties and go to sources, and you can change the Source/Binary Format to a lower JDK version.
Unsupported major.minor version 52.0 comes when you are trying to run a class compiled using Java 1.8 compiler into a lower JRE version e.g. JRE 1.7 or JRE 1.6. Simplest way to fix this error is install the latest Java release i.e. Java 8 and run your program.
Read more: http://javarevisited.blogspot.com/2015/05/fixing-unsupported-majorminor-version.html#ixzz4AVD4Evgv
It happens when you compile your projects on higher version of java(say jdk 1.8) and then run it on a lower version (say jdk 1.7).
If you have JRE-1.7 library in your project path then ,
1.Right click on project
2.Go to Properties
3.Select Project Facets
4.Find Java in rows and then choose version (say 1.7) if using JRE-1.7
5.Click Apply and run your project.
I solved my problem by removing old versions of JRE and installing JRE 8.
I could solve the same problem using the below solution.
In my project, I added a JAR file which were created in Java 8. And my project was referring to JRE 7. When I changed project JRE to 8, my problem was solved.
Steps:
In Eclipse, right click on the project name in project explorer → Build path → Libraries → click on JRE version → click Edit → Installed JRE → Add → Standerd VM → select JRE home click-path (path should be localePath\java\jdk1.8.0_25\jre) → provide name → Save → select same JRE for project → Finish → OK. Refresh/build project once → try to run your Java file. It should work.
I had Java 1.7 & 1.8 installed (with SBT 2.4 that requires Java 1.8).
Even though my project was linked to Java 1.8, I had to change the JAVA_HOME environment variable to point 1.8.
Finally, problem solved.
If you are using Eclipse, make sure your menu Project → Properties → Java build path → libraries → JRE system library matches your project requirements (as shown in the image).
All you need to do to solve the problem is... to make sure your version of Java is the same for both compiling and running. No matter what tools or IDEs you are using.
If you are using Linux and you have different versions of Java installed, use the following command:
sudo update-alternatives --config java
This will give a quick way of switching between the Java versions installed on the system. By choosing Java 8 I will solve your problem.
This occurred to me when I installed a fresh Java 1.8, but left the old command line interpreter open.
It had an old path and kept on executing the application with Java 1.7 whereas project was already built with Java 1.8.
If your JDK version is right. Another reason that may cause this error is that your Android Studio is in a low version, but your Gradle version is too high. Upgrade your IDE to a newer version may help this.
Upgrade your Andorra version to JDK 1.8.
This is a version mismatch that your compiler is looking for Java version 8 and you have Java version 7.
You can run an app build in version 7 in version 8, but you can't do vice versa because when it comes to higher levels, versions are embedded with more features, enhancements rather than previous versions.
Download JDK version from this link
And set your JDK path for this
You need to use JDK 1.7.0 rather than JDK 1.8.0.
To make sure it, you need to delete JDK 1.8.0 on your computer.
If you use Mac, you need to delete:
/Library/Java/JavaVirtualMachines/jdk.jdk
/Library/PreferencePanes/JavaControlPanel.prefPane
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin
Then, you need to reinstall JDK 1.7.0, and you will succeed to generate the .jar file.
You may want to check your Run Configurations setting if you're using Eclipse v4.4 (Luna) and have already completed all steps mentioned above.
There could be several possibilities that cause this error. The root cause is a mismatch of the project require compilation in JDK1.8/JRE8 while the environment compiler is JDK1.7/JRE7.
You can check my blog post to go through all your settings are correct.
None of these answers helped me, but I found a solution.
I had a webproject used in Wildfly 8.2, built with Maven, source and target was set to 1.8 on maven-compiler-plugin, as well as all Eclipse and Maven settings were set to Java 1.8.
The problem was that Wildfly 8.2 cannot handle Java 1.8, so I had to set everything to 1.7 and it worked.
Just want to add this. I had this problem today. Adjusted the settings in my project, rebuilt, and same problem. I had (incorrectly) assumed that changing the settings in my project (Eclipse) would cause the projects on which my project depends to be recompiled also.
Adjusting the settings to all of the projects up the dependency tree solved the problem.
Just go to http://java.com/en/download/ and update your version of JRE
If you are using IntelliJ IDEA, go to Project Structure (Ctrl + Alt + Shift + S), and you can change your project's JDK.
I ran into this issue in Eclipse on Mac OS X v10.9 (Mavericks). I tried many answers on Stack Overflow ... finally, after a full day I *installed a fresh version of the Android SDK (and updated Eclipse, menu Project → Properties → Android to use the new path)*.
I had to get SDK updates, but only pulling down those updates I thought were necessary, avoiding APIs I were not working with (like Wear and TV) .. and that did the trick. Apparently, it seems I had corrupted my SDK somewhere along the way.
BTW .. I did see the error re-surface with one project in my workspace, but it seemed related to an import of appcompat-7, which I was not using. After rm-ing that project, so far haven't seen the issue resurface.
This question already has answers here:
How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version
(51 answers)
Closed 6 years ago.
Pictures:
Command Prompt showing versions
Picture of error
Hello.java
import java.applet.Applet;
import java.awt.*;
public class Hello extends Applet {
// Java applet to draw "Hello World"
public void paint (Graphics page) {
page.drawString ("Hello World!", 50, 50);
}
}
Hello.html
<HTML>
<HEAD>
<TITLE>HelloWorld Applet</TITLE>
</HEAD>
<BODY>
<APPLET CODE="Hello.class" WIDTH=300 HEIGHT=150>
</APPLET>
</BODY>
</HTML>
Error
Hello : Unsupported major.minor version 52.0
What may the problem be?
The issue is because of Java version mismatch. Referring to the JVM specification the following are the major versions of classfiles for use with different versions of Java. (As of now, all versions support all previous versions.)
Java SE version
Major version
1.0.2
45
1.1
45 (Not a typo, same version)
1.2
46
1.3
47
1.4
48
5.0
49
6
50
7
51
8
52
9
53
10
54
11
55
12
56
13
57
14
58
15
59
16
60
These are the assigned major numbers. The error regarding the unsupported major.minor version is because during compile time you are using a higher JDK and a lower JDK during runtime.
Thus, the 'major.minor version 52.0' error is possibly because the jar was compiled in JDK 1.8, but you are trying to run it using a JDK 1.7 environment. The reported number is the required number, not the number you are using. To solve this, it's always better to have the JDK and JRE pointed to the same version.
In IntelliJ IDEA,
Go to Maven Settings → Maven → Importing. Set the JDK for importer to 1.8.
Go to Maven Settings → Maven → Runner. Set the JRE to 1.8.
Go to menu File* → Project Structure → SDKs. Make sure the JDK home path is set to 1.8.
Restart IntelliJ IDEA.
Another approach which might help is by instructing IntelliJ IDEA which JDK version to start up with.
Go to: /Applications/IntelliJ\ IDEA\ 15\ CE.app/Contents/Info.plist
and replace the JVM version with:
<key>JVMVersion</key>
<string>1.8*</string>
The smart way to fix that problem is to compile using the latest SDK and use the cross compilation options when compiling. To use the options completely correctly requires the rt.jar of a JRE (not JDK) of the target version.
Given the nature of that applet, it looks like it could be compiled for use with Java 1.1 meaning you'd use javac -target 1.1.
You will need to change your compiler compliance level back to 1.7 in your IDE.
This can be done in the preferences settings of your IDE. For example, in Eclipse go to menu Windows → Preferences, select Java, and expand it. Then select Compiler and change the compliance level to 1.7. I am sure this will work from there.
You must run and compile your application with the same version of Java.
If you're using Eclipse you should do 2 things:
In Eclipse, click on "Window > Preferences", and in the window that appears, on the left side, under "Java", click on "Installed JREs", click on "Add..." and navigate to the folder that contains the JDK.
Right-click on your project and click on "Properties", in the window that appears, on the left side, click on "Java Compiler" and uncheck "Use compliance from execution environment on the Java Build Path", this allows you to choose in the the list "Compiler compilance level" the same version that you set in the previous step.
You need to upgrade your Java version to Java 8.
Download latest Java archive
Download latest Java SE Development Kit 8 release from its official download page or use following commands to download from the shell.
For 64 bit
# cd /opt/
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u51-b16/jdk-8u51-linux-x64.tar.gz"
# tar xzf jdk-8u51-linux-x64.tar.gz
For 32 bit
# cd /opt/
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u51-b16/jdk-8u51-linux-i586.tar.gz"
# tar xzf jdk-8u51-linux-i586.tar.gz
Note: If the above wget command doesn’t not work for you, watch this example video to download the Java source archive using the terminal.
Install Java with alternatives
After extracting the archive file, use the alternatives command to install it. The alternatives command is available in the chkconfig package.
# cd /opt/jdk1.8.0_51/
# alternatives --install /usr/bin/java java /opt/jdk1.8.0_51/bin/java 2
# alternatives --config java
At this point Java 8 has been successfully installed on your system. We also recommend to setup javac and jar commands path using alternatives:
# alternatives --install /usr/bin/jar jar /opt/jdk1.8.0_51/bin/jar 2
# alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_51/bin/javac 2
# alternatives --set jar /opt/jdk1.8.0_51/bin/jar
# alternatives --set javac /opt/jdk1.8.0_51/bin/javac
Check installed Java version
Check the installed version of Java using the following command.
root#tecadmin ~# java -version
java version "1.8.0_51"
Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)
Configuring Environment Variables
Most of Java-based applications use environment variables to work. Set the Java environment variables using the following commands:
Setup JAVA_HOME Variable
# export JAVA_HOME=/opt/jdk1.8.0_51
Setup JRE_HOME Variable
# export JRE_HOME=$JAVA_HOME/jre
Setup PATH Variable
# export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
Note that the change to the PATH variable put the new Java bin folders first so that they override any existing java/bins in the path. It is a bit sloppy to leave two java/bin folders in your path so you should be advised to clean those up as a separate task.
Also, put all above environment variables in the /etc/environment file for auto loading on system boot.
I had the same problem... a JDK and plug-in version conflict.
I compiled using 1.8 ... the latest one, and that message started to appear.
So I've searched for the JRE 7 (http://www.oracle.com/technetwork/java/javase/downloads/server-jre7-downloads-1931105.html)... and installed it... again...
Now 1.8 and 1.7 in the same computer.
Using NetBeans, and compiling, and targeting to version 1.7, fixed my problem.
If you have a problem in Android Studio and you have installed Android N, change the Android rendering version with an older one and the problem will disappear.
If you're using the NetBeans IDE, right click on the project and choose Properties and go to sources, and you can change the Source/Binary Format to a lower JDK version.
Unsupported major.minor version 52.0 comes when you are trying to run a class compiled using Java 1.8 compiler into a lower JRE version e.g. JRE 1.7 or JRE 1.6. Simplest way to fix this error is install the latest Java release i.e. Java 8 and run your program.
Read more: http://javarevisited.blogspot.com/2015/05/fixing-unsupported-majorminor-version.html#ixzz4AVD4Evgv
It happens when you compile your projects on higher version of java(say jdk 1.8) and then run it on a lower version (say jdk 1.7).
If you have JRE-1.7 library in your project path then ,
1.Right click on project
2.Go to Properties
3.Select Project Facets
4.Find Java in rows and then choose version (say 1.7) if using JRE-1.7
5.Click Apply and run your project.
I solved my problem by removing old versions of JRE and installing JRE 8.
I could solve the same problem using the below solution.
In my project, I added a JAR file which were created in Java 8. And my project was referring to JRE 7. When I changed project JRE to 8, my problem was solved.
Steps:
In Eclipse, right click on the project name in project explorer → Build path → Libraries → click on JRE version → click Edit → Installed JRE → Add → Standerd VM → select JRE home click-path (path should be localePath\java\jdk1.8.0_25\jre) → provide name → Save → select same JRE for project → Finish → OK. Refresh/build project once → try to run your Java file. It should work.
I had Java 1.7 & 1.8 installed (with SBT 2.4 that requires Java 1.8).
Even though my project was linked to Java 1.8, I had to change the JAVA_HOME environment variable to point 1.8.
Finally, problem solved.
If you are using Eclipse, make sure your menu Project → Properties → Java build path → libraries → JRE system library matches your project requirements (as shown in the image).
All you need to do to solve the problem is... to make sure your version of Java is the same for both compiling and running. No matter what tools or IDEs you are using.
If you are using Linux and you have different versions of Java installed, use the following command:
sudo update-alternatives --config java
This will give a quick way of switching between the Java versions installed on the system. By choosing Java 8 I will solve your problem.
This occurred to me when I installed a fresh Java 1.8, but left the old command line interpreter open.
It had an old path and kept on executing the application with Java 1.7 whereas project was already built with Java 1.8.
If your JDK version is right. Another reason that may cause this error is that your Android Studio is in a low version, but your Gradle version is too high. Upgrade your IDE to a newer version may help this.
Upgrade your Andorra version to JDK 1.8.
This is a version mismatch that your compiler is looking for Java version 8 and you have Java version 7.
You can run an app build in version 7 in version 8, but you can't do vice versa because when it comes to higher levels, versions are embedded with more features, enhancements rather than previous versions.
Download JDK version from this link
And set your JDK path for this
You need to use JDK 1.7.0 rather than JDK 1.8.0.
To make sure it, you need to delete JDK 1.8.0 on your computer.
If you use Mac, you need to delete:
/Library/Java/JavaVirtualMachines/jdk.jdk
/Library/PreferencePanes/JavaControlPanel.prefPane
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin
Then, you need to reinstall JDK 1.7.0, and you will succeed to generate the .jar file.
You may want to check your Run Configurations setting if you're using Eclipse v4.4 (Luna) and have already completed all steps mentioned above.
There could be several possibilities that cause this error. The root cause is a mismatch of the project require compilation in JDK1.8/JRE8 while the environment compiler is JDK1.7/JRE7.
You can check my blog post to go through all your settings are correct.
None of these answers helped me, but I found a solution.
I had a webproject used in Wildfly 8.2, built with Maven, source and target was set to 1.8 on maven-compiler-plugin, as well as all Eclipse and Maven settings were set to Java 1.8.
The problem was that Wildfly 8.2 cannot handle Java 1.8, so I had to set everything to 1.7 and it worked.
Just want to add this. I had this problem today. Adjusted the settings in my project, rebuilt, and same problem. I had (incorrectly) assumed that changing the settings in my project (Eclipse) would cause the projects on which my project depends to be recompiled also.
Adjusting the settings to all of the projects up the dependency tree solved the problem.
Just go to http://java.com/en/download/ and update your version of JRE
If you are using IntelliJ IDEA, go to Project Structure (Ctrl + Alt + Shift + S), and you can change your project's JDK.
I ran into this issue in Eclipse on Mac OS X v10.9 (Mavericks). I tried many answers on Stack Overflow ... finally, after a full day I *installed a fresh version of the Android SDK (and updated Eclipse, menu Project → Properties → Android to use the new path)*.
I had to get SDK updates, but only pulling down those updates I thought were necessary, avoiding APIs I were not working with (like Wear and TV) .. and that did the trick. Apparently, it seems I had corrupted my SDK somewhere along the way.
BTW .. I did see the error re-surface with one project in my workspace, but it seemed related to an import of appcompat-7, which I was not using. After rm-ing that project, so far haven't seen the issue resurface.
There is something going wrong with my java configuration and it is really bugging me. I am using IntelliJ IDEA and after downloading and installing java 8 I tried to configure my project to use that SDK but I could only locate version 1.6 under /Library/Java/JavaVirtualMachines/. I am new to OS X and I am really confused with the paths.
Looking on my Java control panel I can see I got installed Java 8 but after running java -version on the terminal I get 1.6.0_65.
And the which java gives back /usr/bin/java.
Please help I am completely lost
Here is an example with several Java versions installed side-by-side ...
ls /Library/Java/JavaVirtualMachines/
jdk1.7.0_25.jdk jdk1.7.0_72.jdk jdk1.8.0_05.jdk jdk1.8.0_25.jdk
User can edit ~/.profile to point explicitly at one
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_72.jdk/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH
And here is result ...
java -version
java version "1.7.0_72"
Java(TM) SE Runtime Environment (build 1.7.0_72-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)
Well something was wrong with the installation. I completely removed the other versions (not 1.6) and reinstalled 1.8 using the default path (as there is no option to change it during installation. Now IntelliJ can see JDK 1.8
Thanks for the help anyway
I am running android studio on a Mac os x maverick. I have installed the 64bit JDK. When I run the emulator I get the message
Error:Abnormal build process termination:
Error: This Java instance does not support a 32-bit JVM.
Please install the desired version.
in android studio.
java -version
returns
version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
and
$JAVA_HOME
points to
/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home
So every thing seems to be fine. What could possibly be wrong?
Update:
I still had an old jdk1.6 lying around on my mac. When removing it Android Studio was asking to install Java 6 again. So apparently Android Studio needs Java 6 to compile (as confirmed by Andrew in the comment of this question). Hoping that it would install the x64 version I let it install Java 6. However I still wasn't successful afterwards. I neither could find Java 6 for Mac OS X 64 Bit. Any hints on that?
Android Studio can run on whatever it needs, but the error seems to be pointing to the SDK that the project is using. To check what your project is using, go into Project Structure > Project Settings > Project. You should now see the Project SDK. It should say something like "Android API ## Platform (java version "1.7.[current version number]"). If it doesn't say 1.7.[current version number], then it probably needs to be updated.
Here's what you can do to update it:
In Project Structure > Platform Settings > SDKs, click the "+" button to add a new SDK.
In the pop-up, go into your Android SDK folder and click "Choose"
Another pop-up will appear asking for which SDK and JDK you want to use. Choose any Android SDK and the 1.7 JDK.
Go to Project Structure > Project Settings > Project and change your Project SDK to the one you just created. You should see the name of the SDK with the new Java version that you installed.
I am not sure but I think that sometimes the error is actually stating a falsehood, and is misleading.
I agree with #Maxwell inasmuch as the problem is a mismatch between the JDK configured for the project and the JDK that IntelliJ is running under.
The specific problem I encountered was Running IntelliJ 13.1.1 with 1.6.0_65 ... x86_64 while compiling a project configured with a Java 7 x64 JDK. Reconfiguring the project to an x64 Java 6 JDK put out the fire.
I resolved this issue by doing the following:
Go to File -> Project Structure... -> Platform Settings -> SDKs
Select the SDK listed
Click on the ' - ' to remove it.
Restart Android Studio
Go to File -> Project Structure -> Platform Settings -> SDKs
Select the SDK listed
Click on the ' + ' to add it (follow path to your JDK HOME)
Restart Android Studio, and re-Build your Project.