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I'm trying to start programming in Java. I went to JAVA SE Downloads, clicked on the JDK 15 Downloads, selected Windows X64 Installer, agreed to the license, and allowed it to make changes to the computer. When the wizard popped up I followed all of the prompts. A screen came up that said Next Steps or close. I selected next steps which took me to the JDK documentation page. I already had that open so I went back and selected the other option and closed the installer. I selected the Windows, scrolled down to the new folder Java Development Kit, and when I opened it there was a file that led me to the Documentation page, but that was all that was there.
Am I missing a step? How do I get the actual JDK development environment?
Looking forward to starting programming in Java, but can't seem to get the platform started. Thanks for any advice, or questions that may help.
When you get to the screen in the wizard that says "Next Steps" and "Close", you are pretty much set, the JDK was installed on your computer. To verify that this is the case, you can go to C:\Program Files\Java\jdk-15\ (which is typically the default folder). To make sure that Java and the Java Compiler were added to your environment variables, open a command prompt window and type in java -version and javac -version. You should get a version number for both of those commands. If you do see the jdk-15 folder in your C: drive but don't get the version numbers in the command prompt window, you must add the java bin directory to your environment variables. You can easily find tons of articles showing how to do this on Google by searching for something along the lines of "How to add Java to environment variables".
I'm using JDK 15 on windows too. After download JDK 15, open the control panel and go to system and security. After that open at system and click at advanced system settings. At advanced system setting, open enviroment variables and select path at system variables and click edit it. After that, go to folder java that you install and open the folder bin in JDK 15. Copy the destination folder JDK 15 bin like this ''C:\Program Files\Java\jdk-15\bin'' and add new at path enviroment variable. After that, click new in system variable. At variable name I put JAVA_HOME and variable value, you copy the JDK 15 file path and paste like this ''C:\Program Files\Java\jdk-15'' (Note that you folder is not the same as mine). After that, open cmd (command promt) and type java -version to know your version. Hope this is helpful.
Related
My ls /Library/Java/JavaVirtualMachines tells me I have multiple jdks installed but the path from the finder only gives me jdk 17.0.2.
Due to this, I am not able to provide the jdk 16's path in my Netbeans to add another jdk platform to test and run my project.
Any help would be great :) !!!
Finder doesn't hide JVMs for funsies. If ls says they exist, they exist. Try as a trick navigating to one of the JDKs you can't find with cd, and then typing open . on the command line. What happens then? Alternatively, hit CMD+K (go to folder) and paste a full folder. Then just drag from there to the netbeans dialog.
NB: For the future / for others answering this question, you might want to mention in your question that you're using MacOS, or tag it with macos.
I am relatively new to stack overflow, VSCode, and programming. I am using a Mac. I downloaded VSCode for use with Python around two months ago. I can not run my code in VSCode but I enjoyed working in VSCode so I would write in it and run my code outside of it. Now I have the same issue with Java. I can not "solve," this in the same way because I do not know how I can run my Java code outside of an IDE.
I first read the instructions for setting up VSCode for Java on VSCodes website. I followed the instructions but when I tried to run a, "Hello world," program it said I did not have a debugger. I re-installed Redhat's Java support, closed and re-opened VSCode, and tried to run it again. This time it said java.jdt.Is.home is pointing to a missing or inaccessible folder. I looked this up found one description of this issue from 2018. I had a hard time understanding what it was asking me to do but at my best interpretation I wrote "which java," in Terminal and copy pasted what it returned (usr/bin/java) into settings.json after "java.home: ". This gave me an error stating that it is outdated and I should change it to, "java.jdt.Is.home: " so I did. I also tried adding "local/" between "usr/" and "bin" as it appeared in my path to my Python3 interpreter. All of these gave me the same error when I tried to run a hello world program.What can I do to solve my issue with Java in VSCode?
which java can not get the right java home.
You need to take /usr/libexec/java_home or /usr/libexec/java_home -V.
Java home on MacOs looks like: /Library/Java/JavaVirtualMachines/jdk-16.jdk/Contents/Home
But You need not set the "java.jdt.ls.java.home" at all. Because the JRE has been embedded in the Language Support for Java(TM) by Red Hat extension.
Only the universal version without embedded JRE can specify the java.jdt.ls.java.home manually. Otherwise, it will search JDK_HOME JAVA_HOME current system path.
You can refer to the official dosc.
So, have you installed the related extensions? You can install Extension Pack for Java, which contains the extensions you need.
I am a little confused about why you can not run the python or java codes, it's very rare. After you installed the related extensions(Python Extension Pack) , just right-click in the editor, you can select the Run Java Debug Java Run Python File in Terminal and so on. Or you can click the button on the top-right.
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I just installed Netbeans and I wanted to write a small program that can read a value and then show it on screen. The thing is that whenever I add the sentence System.out.println() it marks an error and it says that the class is unidentified. I've tried to solve looking for it's library but I got no clue. Would you mind giving me a hand
You need to setup your project JDK. Here`s how to do it:
To enable JDK support in the NetBeans IDE:
1.Download and install JDK on your system.
2.In the IDE, choose Tools > Java Platforms from the main menu.
3.Click Add Platform and specify the directory that contains the JDK (e.g. on Windows, this is the JDK installation directory, default is C:\Program Files\Java\jdk_version).
4.The directory that contains the Java platform is marked with the Java Platform icon icon.
5.In the Platform Name step, verify that the default locations of the Platform Sources zip file and API documentation are valid.
6.Click Finish to close the Add Java Platform dialog box.
7.Ensure JDK is chosen in the Platforms list and click Close.
Once you have registered JDK in the IDE, you need to configure your project to use this JDK for compilation, running, and debugging:
1.Create a Java project. Choose File > New Project and select Java Application as the project type. Click Next.
2.Type ProjectNameHere as the project name and specify its location.
3.In the Files window, right-click the ProjectNameHere project's node and choose Properties > Libraries. On this tab, choose JDK from the list of Java Platforms.
4.Switch to the Sources tab of the Project Properties window and choose JDK as the Source/Binary Format.
5.Click OK to save changes. Your project is set to recognize new JDK language features.
You can refer to this link:
https://netbeans.org/kb/73/java/javase-jdk7.html
Use this guide for your first code
https://netbeans.org/kb/docs/java/quickstart.html
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Error Code 1603. Java Update did not complete. I have a java error
I think it is a server problem, the first time I create my server and the user interface does not open.
From https://java.com/en/download/help/error_1603.xml
Option 1: Restart your system and uninstall old versions
Restart your system before installing
Once you see the 1603 error, restart your system.
Download and install the offline installer package.
When prompted, choose Save in the download dialog box, and save the download package in a convenient place (e.g. save on the desktop).
Double click on the downloaded installation file to start the installation process.
Uninstall Java versions before installing
If the above instructions fail to resolve the issue, it is recommended that you uninstall all existing Java versions from
the system.
Reboot the system after you uninstall all Java versions, before trying to install.
Option 2: Disable Java content through the Java Control Panel
This option disables Java content in the browser prior to installing.
Once you see the 1603 error, close the installer.
Find and launch the Java Control Panel
Uncheck (de-select) Enable Java content in the browser option
In the Java Control Panel, click the Security tab.
Uncheck the option Enable Java content in the browser.
Click Apply and then OK to confirm the changes.
Reinstall Java and re-enable Java content in the browser
Download and install the offline installer package.
After the installation has completed, re-enable the option to Enable Java content in the browser, if you require running Java content in the browser.
So I am attempting to develop a JavaFX program using my favourite editor (Visual Studio Code) and then run that program through the windows 10 Command Prompt Command Line using
javac program.java
then
java program
I am currently running jdk & jre 1.8.0_181 (which I have been told already includes the JavaFX packages) however I keep getting compilation errors saying that the packages dont exist
Error: Package javafx.collections does not exist.
import javafx.collections.*;
^
I am currently in my third year of an information technology degree at university and on my university computers, javafx programs run completely normally just using the commands mentioned above however when I attempt to recreate these on my personal laptop, I get those errors. I know my program has no coding errors because it worked on their version with no compilation/runtime errors. If anyone can suggest any reasons why this may be happening (i.e. there is something I need to do to setup my javafx properly or I need to use a specific command to run the program) it would really help. Thanks.
So I was the one to originally ask the question but I just found a solution that happens to work and for those in the future who have this issue, I uninstalled ALL versions of java that I had running on my computer completely through the "Add or Remove Programs" page. Once done I installed specifically this version of Java (none of the others worked properly for me but this may differ for you): Java SE Development Kit 8u192 (Found at https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html). Once installed, find your Java directory in your Program Files directory "C:\Program Files", and open the jdk folder that you just installed. Get the path to this folder and copy it to the clipboard. Open your control panel, click on "System and Security" (if you cannot find this button, skip to the next step). Click on "System" > "Advanced System Settings" (on the left bar). Click the "Advanced" tab at the top, then "Environmental Variables..." at the bottom. Under "System Variables", look for a variable called JAVA_HOME. If you cannot find it, click "New", enter "JAVA_HOME" into the "Variable Name" field, and enter the path you copied to the clipboard earlier into the "Variable Value" field. Click "OK". Next find the "Path" variable and click edit. Look for a directory in the list similar to "C:\Program Files\Java{some jdk here}\bin". If you find one, click it, click delete on the right and then click new. Then in the created text field, enter "%JAVA_HOME%\bin". Click "OK" until all of the windows we opened are closed. The javac should now work with JavaFX.