Dog dog=new Dog("哈士奇","黑白",2); System.out.println(dog); } } class Dog { private String name; private String color; private int age; public String getName(){ return name; } public String getColor(){ return color; } public int getAge(){ return age; } public void setName(String name){ this.name=name; } public void setColor(String color){ this.color=color; } public void setAge(int age){ this.age=age; } public Dog(String name,String color,int age){ super(); this.name=name; this.color=color; this.age=age; } public String toString(){ return "狗的名字:"+this.name+",狗的颜色:"+this.color+",狗的年龄:"+this.age; } }
package core; public class Y2 { public static void main(String[] args) { // TODO 自动生成的方法存根 User user1=new User("黑王","545789"); user1.print(); User user2=new User("红六","754582"); user2.print(); new User().count(); } } class User { private String name; private String password; private static int count; public User(){ count++; } public User(String name){ this.name=name; count++; } public User(String name,String password){ this.name=name; this.password=password; count++; } public String getName(){ return name; } public void setName(String name){ this.name=name; } public String getPassword(){ return password; } public void setPassword(String password){ this.password=password; } public void print(){ System.out.println("用户名:"+name+" "+"口令:"+password); } public void count(){ System.out.println("用户个数:"+(count-1)); } }