StackOverflow exception occuring when running the java class

Question

I have a class Test. When i run the program it throws Stackoverflow error.

Class:

public class Test {

   private Test test = new Test();
    
   public Test() {

      System.out.println("ijshfiksh");
   }



   public static void main(String[] args) {
      Test test = new Test();
   }
}

Error

Exception in thread "main" java.lang.StackOverflowError
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)
at Test.<init>(Test.java:5)

Can anyone tell my why this is happening?

Answer 1

As you can see from here:

public class Test {
   private Test test = new Test();
   ...
}

You are creating an instance of Test inside Test: to build that Test instance, you have to build another instance of Test, which also requires an instance of Test, and so on