摘要：继承： public class Super { public static void main(String[]args){ new son().f(); } } class Father{ public int value; public void f(){ value=100; System. 阅读全文

摘要：实例化同名对象时赋值 public class User { int id; String name; String pwd; public User(){} public User(int id ,String name){ super(); this.id=id; this.name=name; 阅读全文

摘要：实例一： public class people { public static void main(String[] args) { person p1 = new person();//实例化一个人，p1 p1.name = "张三"; p1.age = 24; p1.hight = 170; 阅读全文

摘要：九九乘法表 public class jiujiu { public static void main(String[] args){ for(int i=1;i<=9;i++){ for(int j=1;j<=i;j++){ System.out.print(j+"*"+i+"="+(i*j<10 阅读全文