[VS Code has prompted "No delegateCommandHandler" while debugging the Java program]

Environment

• Operating System: macOS Monterey Version 12.6.5
• JDK version: 1.8.0_292 (x86_64) "AdoptOpenJDK"
• Visual Studio Code version: 1.78.1
• Java extension version: (Language Support for Java(TM) by Red Hat) v0.64.1
• Java Debugger extension version: (Debugger for Java) v0.50.0

Steps To Reproduce

1. Create a java file and the launch JSON file for VS Code, then compile and run.

Compile and run are successful, also, output the result of this java program. just liking:

2. Run&Debug using "StartDebugger(F5)" Button

VS Code has prompted "No delegateCommandHandler for vscode.java.resolveMainMethod".

A Sample Project

My workspace, just liking:

testJavaDevelopDemo
|____  .vscode
|           |___ launch.json
|____ testDemo.java

My "testJavaDevelopDemo/.vscode/launch.json" just liking:

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
    
        {
            "type": "java",
            "name": "Debug (Launch)",
            "request": "launch",
            "mainClass": "${file}",
            "console": "integratedTerminal"
         }
   ]
}

My "testJavaDevelopDemo/testDemo.java' just liking:

public class testDemo {
    public static void main(String[] args) {
           int a=1;
           int b=2;
           int c = a + b;
           System.out.println(a+"+"+b+"="+c);
           System.out.println("hello world");
    }

}

LOGS

Sorry, I had not known how to check out the logs of debugging.

Current Result

The VSCode has prompted "No delegateCommandHandler for vscode.java.resolveMainMethod"

while I click the "Start Debugger(F5)" button. Just like the below picture showing:

                 Notice Prompt: No delegateCommandHandler for vscode.java.resolveMainMethod

Expected Result

The VSCode could enter Debugger status while I click the StartDebugger(F5) button, just liking the below picture.

                                Notice: Successfully Start Debugger 

Additional Informations

Try to fix the problem

1. Restart&Reboot Again Ang Again

I refer the Troubleshooting of vscode-java-debug, restart the "VSCode" once and the issue appear again, then reboot the

laptop and "VSCode", but that still a problem.

2. Downgrading Version And Reload Required

Also, I found the same error liking #1308, tried to Downgrading versions of

the Test Runner for Java extension, also, I pressed "reload required" button next to the "uninstall" button,

but that did not fix my issue.

SO I have to open this issue!

Java Home configuration

Just add the below code into my ZSH configuration file ~/.zshrc.

JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
PATH=$PATH:$JAVA_HOME/bin
CLASSPATH=$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME
export PATH
export CLASSPATH

Also, I config the "javahome" on the Settings of VSCode.

Others Environment

• Java extension version: (Extension Pack for Java) v0.9.1
• Java Test Runner extension version: v0.38.2
• Maven for Java version: v0.41.0
• Project Manager for Java version: v0.22.0
• IntelliCode extension version: v1.1.8
• IntelliCode API Usage Examples extension verison: v0.2.7