A printed face questions

Topics are as follows:

public static void main(String[] args) {
        int a=10;
        int b=10;
        method(a, b);
        System.out.println("a***"+a);
        System.out.println("b***"+b);
    }

How to print out

a***1000
b***1000

method one:

public static void method(int a,int b) {
        a = a*100;
        b = b*100;
        System.out.println("a***"+a);
        System.out.println("b***"+b);
        System.exit(0);//退出虚拟机
    }

Method Two:

public static void method(int a, int b) {
        PrintStream Sys = new PrintStream(System.out){
            @Override
            public void println(String x) {
                super.println("a="+a*100+", b="+b*100);
            }
        };
        System.setOut(Sys);
//        try {
//            System.setOut(new PrintStream(new FileOutputStream("D:\\a.txt")));
//        } catch (FileNotFoundException e) {
//            e.printStackTrace();
//        }
    }