修改用户名和密码

![在这里插入图public class ChangeMassage {

String name;
String password;

public static void main(String[] args){

    ChangeMassage cm = new ChangeMassage() ;
    cm.name  = "manger";
    cm.password = "0000";

    Scanner input = new Scanner(System.in) ;
    System.out.print("请输入旧用户名：");
    String n = input.next() ;
    System.out.print("\n请输入旧密码：");
    String p = input.next() ;

    if(n.equalsIgnoreCase(cm.name ) && p.equalsIgnoreCase(cm.password ) ) {
        System.out.print("请输入新用户名：");
        String rn = input.next() ;
        System.out.print("\n请输入新密码：");
        String rp = input.next() ;
        System.out.println("\n用户名："+rn+"\n密码："+rp);
    } else if(!n.equalsIgnoreCase(cm.name ) && p.equalsIgnoreCase(cm.password ) ){
        System.out.println("用户名不正确！无权修改！");
    } else if(n.equalsIgnoreCase(cm.name ) && !p.equalsIgnoreCase(cm.password ) ){
        System.out.println("密码不正确！无权修改！");
    }
}

}
片描述](https://img-blog.csdnimg.cn/20200303224740271.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L015Y29kZTEyMzQ=,size_16,color_FFFFFF,t_70)