简单java类

package test;

//设计用户User类：用户名、口令、用户数量个数
class User{
	private String uid;
	private String password;
	private static int count=0;//累积计数
	public User() {
		this("NOID","mldn");
	}
	public User(String uid) {
		this(uid,"mldnjava");
	}
	public User(String uid,String password) {
		this.uid=uid;
		this.password=password;
		count++;
	}
	public static int getCount() {
		return count;
	}
	
}

public class JavaDemo {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		User userA=new User();
		System.out.println(User.getCount());
	}

}