Stackoverflowerror is an error, not an exception.

Method is placed in the stack space. By default, it is only 512k-1024k. By making recursive calls, you can fill up the stack space.

public class StackOverFlowErrorDemo {
    public static void main(String[] args) {
        // Exception in thread "main" java.lang.StackOverflowError
        stackOverflowError();
    }

    private static void stackOverflowError() {
        stackOverflowError();
    }
}