JAVAIO中BufferedReader的应用1

来源：互联网发布：股市大讲堂软件编辑：程序博客网时间：2024/04/29 00:45

import java.io.*;import java.util.regex.*;class CheckDigit{public boolean check(String str){if(str.matches("\\d+")){return true;}else{System.err.println("必须是数字!请重新输入");return false;}}}class InputData{BufferedReader br =null;String success=null;String tips=null;String str = null;public InputData(String tips,String success){br=new BufferedReader(new InputStreamReader(System.in));this.success=success;this.tips=tips;}public String getStr(){System.out.println(tips);try{str=br.readLine();}catch(Exception e){e.printStackTrace();}return str;}public Integer getInteger(){System.out.println(success);return Integer.parseInt(str);}}public class override{public static void main(String args[]){BufferedReader br = new BufferedReader(new InputStreamReader(System.in));int i=0;int j=0;boolean flag=true;CheckDigit cd = new CheckDigit();InputData id1 = new InputData("请输入第一个数字","输入成功!");while(flag){if(cd.check(id1.getStr())){i=id1.getInteger();flag =false;}}InputData id2 = new InputData("请输入第二个数字","输入成功!");if(cd.check(id2.getStr())){j=id2.getInteger();}System.out.println(i+"+"+j+"="+(i+j));}}

要求:通过键盘输入数据完成加法操作