Unresolved compilation problem while executing Java in VS Code

Question

I have been trying to execute this code in VS Code

    class test1 extends Thread
    {
       public void run()
       {
           for(int i=0;i<10;i++)
           System.out.println("Task 1");
       }


    }
    class task2 extends Thread
    {
      public void run()
      {
          for(int i=0;i<10;i++)
          System.out.println("Task 2");
      }
    }
    public class app
    {
         public static void main(final String[] args) throws InterruptedException {
             final test1 t1 = new test1();
             final task2 t2 = new task2();
            t1.start();
            t2.start();
        }
    }

but it shows an exception in main thread:

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 

        at app.main(test1.java:21)

(see screenshot)

I tried different IDEs(like BlueJ) and this code is working fine with them. So what exactly is the problem I am facing while executing it in VS Code?

You will need to tell us what the error is. Show us the exception message and the stacktrace. — Stephen C
– Stephen C, Commented Apr 24, 2020 at 9:16
I have added a screenshot of that error message. Please, have a look at it. — varad_21
– varad_21, Commented Apr 24, 2020 at 16:29
OK. So it says there is a compilation error. What is the compilation error message? — Stephen C
– Stephen C, Commented Apr 25, 2020 at 4:27

sainaen · Accepted Answer · 2020-04-24 17:05:54Z

1

It looks like you’re having a file with a name test1.java, but the java compiler requires that the file name matches the name of the public class inside.

Try either

renaming the file to app.java
renaming the class app → test1, but then you’ll have to rename existing test1 to something else
make the app not public (and you will still be able to run it)

(I’m not sure why VS Code doesn’t report this problem properly.)

answered Apr 24, 2020 at 17:05

sainaen

1,57810 silver badges18 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

varad_21 Over a year ago

Thanks a lot, man! It is indeed true that the compiler requires file name to be matched with the name of public class inside, so just removing the public keyword makes my program to run without any error.

Collectives™ on Stack Overflow

Unresolved compilation problem while executing Java in VS Code

1 Answer 1

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Related