关于#java#的问题，请各位专家解答！

Java

public class Test {

    int fangfa1(int x, int y) {
        return x - y;
    }

    static int fangfa2(int x) {
        return x * x;
    }

    public static void main(String[] args) {
        Test test = new Test();
        System.out.println("fangfa1 result is " + test.fangfa1(5, 3));
        System.out.println("fangfa2 result is " + Test.fangfa2(3));
    }

}