}

public void withdraw()throws IOException{ }

public void getbalance(){ }

System.out.println("余额为:"+fund); System.out.println("请输入取款金额:"); BufferedReader br = new BufferedReader(new double s = Double.parseDouble(br.readLine()); if(s>1000)

System.out.println("余额不足,余额为:"+fund);

System.out.println("取款成功 :"+"余额为:"+(fund-s)); else

InputStreamReader(System.in));

(3) 编程定义一个接口，实现三个数中求最小值和最大值的方法，并将程序存放在mymaths包中。 package mymaths;

public class Jiekou { }

class MAX implements Tsort {

int a,b,c;

public MAX(int a,int b,int c){

this.a=a;

public static void main(String[] args){ } }

public void max(); public void min();

// TODO Auto-generated method stub MAX ma = new MAX(1,8,10); ma.max(); ma.min();

interface Tsort{