If you get the error: “Cannot retrieve the latest commit at this time”, this is a sign that the current version of vscode-java does not work with your environment.
To fix it, click the “Install Java Dependencies” button in the status bar at the bottom of Visual Studio Code.
That should download and install everything you need to run Java in vscode.
If this still doesn’t work, try uninstalling and reinstalling vscode-java.
If you are using vscode and trying to run a java program, you may have encountered the following error:
Launching “program name” with the default JVM terminated with exit code 1.
This is very easy to fix by simply changing your settings.json file. To access this file, go to the bottom left corner of vscode and click on the gear icon. Then click on the Open Settings (JSON) option. You should see a new tab open up that shows your current settings.json file.
Now, scroll down to the bottom of the file and add this line:
“java.home”: “C:/Program Files (x86)/Java/jdk1.8.0_241/bin/”
Make sure to change the path in quotes to where your java bin folder is located on your computer. Now go ahead and save the file and close it, then try running your program again!
Microsoft’s vscode has become a very popular editor for java developers and is now included in many of the official getting started tutorials from the language and framework authors themselves. One issue that comes up pretty quickly when working with vscode is the lack of support for checking your code as you type, showing errors inline and providing auto-completion suggestions. This can easily be solved by installing one of the following extensions:
Java Extension Pack (jre8 or later required)
Eclipse Keymap (for those coming from Eclipse)
Debugger for Java (vscode marketplace link)
Language Support for Java(TM) by Red Hat (alternative to ‘Java Extension Pack’)
The problem is that VS Code cannot find the JAVA_HOME environment variable. This can be solved by creating a new launch.json file in .vscode directory. For example, if you have installed Java on your machine (e.g., C:\\Program Files\\Java\\jdk1.8.0_231), add the following configuration to launch.json:
{
“version”: “0.2.0”,
“configurations”: [
{
“type”: “java”,
“name”: “CodeLens (Launch)- HelloWorld”,
“request”: “launch”,
“mainClass”: “HelloWorld”,
“console”: “internalConsole”,
// In order to use this configuration, you need to set JAVA_HOME environment variable (e.g., C:\\Program Files\\Java\\jdk1.8.0_231) pointing to your JDK installation directory on your system. This can be done by running ‘setx /M JAVA_HOME “
The java.home setting, which VS Code uses to find your Java installation, is not set. If you have installed the JDK, but not set JAVA_HOME or java.home in VS Code settings, we will attempt to infer the location of your JDK from the java.exe that you are running from inside VS Code.
In order to improve performance, we cache the inferred location of your JDK and only re-infer it when your java.exe changes. This means that if you install a new version of the JDK and update your PATH variable so that java.exe now points to a new version, you will need to restart VS Code before this change is detected by our extension (see Debugging Java for details on how to restart VS Code).
If you want to override the inferred location of your JDK, open File > Preferences > Settings (Code > Preferences > Settings on Mac) then search for ‘java.home’ and add this setting with a path pointing to your JDK’s home folder.
If you are getting an error message: Error: Could not find or load main class, then check the following two things:
Your current directory is the root directory of your project. (from where you run the javac and java commands).
The name of your .java file containing the main method is exactly the same as your class name. For example, if your class is called HelloWorld (with a capital “H”), then your file must be named HelloWorld.java.