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I am new to Java programming.I am running on Eclipse right now and it doesn't import Swing libraries.It shows a red X and it says Access restriction.Can anyone help me?
As you said i am new so i am writing detailed steps for you to fix this issue. I am assuming your installation and class path settings are fine.
1) Right click on your project and click "Properties"
2) From left column select "Java Build Path"
3) Now select third tab "Libraries"
4) Click on "JRE System Library"
5) Now Remove selected JRE System Library via "Remove" button.
6) Now in order to Add it back, Select "Add Library" and select the JRE System Library
Its default library It should work for your if installation and class path settings are fine.
I understand what you are saying and like to ask you if:
you got the newest (proper) JDK (http://www.oracle.com/technetwork/java/javase/downloads/index.html the left link)
you got a good JRE (http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html)
you should also check your windows permissions set yourself as admin
also if all else fails i'd try netbeans since this is like a really universal IDE, you can download newest netbeans + jdk on site above aswell (right link)
hope i could be off service
And welcome to the wonderfull world of Java
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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.
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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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Does a "Find in project..." feature exist in Eclipse IDE?
(15 answers)
Closed 3 years ago.
I am new to java world.
I am working on ECLIPSE IDE. I have a function name that i need to use but i am not able to find in which class it is written.
How can i get this information
Can some one help me out here
When you are coding in Eclipse, press CTRL and click on any core Java class/Custom Class/Methods name in your source. You will be taken to the source.
Eclipse will now show a screen saying you don't have the sources installed if you are trying to access a code for which you don't have source. However, in this screen there will be a link saying "Attach source...". Click that link and import the src.zip file from your JDK installation directory (src.zip).
Use JDK in development environment not JRE, this is good for learning
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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.
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I had to configure a 'JavaMysqlConnectorApp' project to JPA project on Eclipse.
But when I revert changes manually to back earlier project on Eclipse, it shows error icon on project explorer.
Please find two image links where shows detail about problem.
Here is error icon on project
Eclipse bottom 'problem' tab shows why error icon showing on Project
How to convert jpa project to normal java project(without JPA) on Eclipse?
Thanks in advance to all.
Ok I find the way...
Followed the following steps to back java project from JPA project :
click to the project properties
find the 'Project Facets' bellow 'Maven' on left side of the properties window.
unchecked the 'JPA' on project facet ( I don't need JPA in mine project anymore )
save all changes
Then cleaning project and find no more error icon on mine project.
This link shows you the lucid view !
Cheers. Thanks to all for your valuable suggestion.
One click away.
On the top right corner you can easily choose perspectives, just choose any other than JPA.
I'm not in front of Eclipse now, but if i recall correctly there should also be a context menu on project right click, named "JavaEE Tools" where you can permanently turn off JPA on this project.