下面程序在1式和2式处分别将会显示什么? public class Test { private int num1; private static int num2; private int num3; static { num2 = 10; System.out.println("init num"); } public Test() { num1 = 10; num3 = 10; } public void f1(int num1, int num3) { num1 = 20; num2 = 20; num3 = 20; } public void f2(int num4) { num1 = num4; num2 = 30; num3 = 30; } public void print() { System.out.println("num1=" + num1); System.out.println("num2=" + num2); System.out.println("num3=" + num3); } public static void main(String[] args) { Test test = new Test(); test.f1(20, 20); test.print(); // 1式 test.f2(30); test.print(); // 2式 } }