Java at debug time, some variables can be expanded indefinitely (loop)?

When throwing exceptions, when Java Debug, some variables can be infinitely expanded, how to do it?

Let's start with an example of an error:

Exception in thread "main" Java.lang.StackOverflowError
At llj.mf.ace.c.<init> (c.java:3)
At llj.mf.ace.b.<init> (b.java:5)
At llj.mf.ace.c.<init> (c.java:5)
At llj.mf.ace.b.<init> (b.java:5)
At llj.mf.ace.c.<init> (c.java:5)
At llj.mf.ace.b.<init> (b.java:5)
At llj.mf.ace.c.<init> (c.java:5)
At llj.mf.ace.b.<init> (b.java:5)
 ....
 ....

Code for Error:

public class Ace {public static void main (string[] args) {new B ();}} public class B {c c = new C ();} public class C {b b = new B ();}

Cause of error: When you create a B object, the B object creates a C object, and the C object creates a B object ... This creates countless B objects, C objects, so it stackoverflowerror .

An example that can be infinitely expanded:

/** * This debug, there is an infinite number of subordinates (you have me, I have you) */public class BCBC {public static void main (string[] args) {b b = new B (); c C = new C (); B.C = c;c.b = b; System.out.println (B.equals (c)); Breakpoint at}static class B {c C;} Static Class C {b b;}}

The above example debugs:

This creates only a B object, a C object, and then references each other (pointing to the other's address). (I pointed at you, you pointed at me: B <------> C)

This explains why some variables can be expanded indefinitely when Java Debug is thrown.

Java at debug time, some variables can be expanded indefinitely (loop)?