java定义用户信息类 java编写账户类account

 

 

package com.hanqi.test;

//银行账号
public class account {
     private String zhanghao;//账号
     
     //私有余额
     private double yue;//余额
     
     //double cunkuan;
    // double qukuan;
     //构造方法=
     
     //有参无返
      account(String zh)
     {
    	 zhanghao=zh;
     }
     account(String zh,double ck)
     {
    	 zhanghao=zh;
    	 yue+=ck;
     }
     //成员方法
     void cunqian(double qk)
     {
    	 yue+=qk;
    	 System.out.println("当前余额是："+yue);
     }
     //成员方法
     
     boolean qukuan(double qk)
     {
    	 if(qk<=yue)
    	 {
    		 yue-=qk;
    		 System.out.println("余额为："+yue);
    		 return true;
    	 }
    	 else
    	 {
    		 System.out.println("余额不足");
    		 return false;
    	 }
     }
     void getYue()
     {
    	 System.out.println("账号是："+zhanghao+"当前余额："+yue);
     }
     
}

　　

package com.hanqi.test;


public class Test05 {

	public static void main(String[] args) {


 account ac=new account("234234", 1000);
 ac.qukuan(1000);
ac.cunqian(200000);
 ac.qukuan(2000000);
 

 
		
		
	}	
}