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+"\t"+"口令："+password);
}
public void count(){
	System.out.println("用户个数："+(count-1));
 }
}