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); } }