userdemo.java

来自「javauser 的类 很简单的东西 例题」· Java 代码 · 共 48 行

/**   */
class User
{
	String username;
	private String password;
	static int num=0;
	User()
	{
		num++;
	}
	User(String s)
	{
		username=s;
		num++;
	}
	User(String s1,String s2)
	{
		this(s1);password=s2;
	}
	void set(String s)
	{
		password=s;
	}
	String get()
	{
		return password;
	}
	String show()
	{
		return "username:"+username+"\n"
				+"password:"+password;
	}
};
class  UserDemo
{
	public static void main(String[] args) 
	{
		User u1=new User();
		System.out.println(u1.show());
		User u2=new User("zhangsan","123456");
		System.out.println(u2.show());
		User u3=new User("lisi");
		u3.set("abcdef");
		System.out.println(u3.show());
		System.out.println(User.num);
	}
}