import java.util.Scanner;

public class Calculator {
 Scanner input = new Scanner(System.in);
 public void show() {  
  char Calculator;
  double num = 0;
  double num1 = 0;
  System.out.println("请输入第一个整数：");
  do {
   if (input.hasNextInt() == false) {
    System.out.println("输入错误！");
    break;
   }
   if (input.hasNextInt() == true)
    ;
   {
    num = input.nextInt();
   }
   System.out.println("请输入第二个整数：");
   if (input.hasNextInt() == false) {
    System.out.println("输入错误！");
    break;
   }
   if (input.hasNextInt() == true) {
    num1 = input.nextInt();
   }
   System.out.println("请输入运算符号：+ - * /");
   Calculator = input.next().charAt(0);
   switch (Calculator) {
   case '+':
    System.out.println(num + "+" + num1 + "=" + (num + num1));
    break;
   case '-':
    System.out.println(num + "-" + num1 + "=" + (num - num1));
    break;
   case '*':
    System.out.println(num + "*" + num1 + "=" + (num * num1));
    break;
   case '/':
    System.out.println(num + "/" + num1 + "=" + (num / num1));
    break;
   }
   break;
  } while (input.hasNextInt() == false);

****************************************************

package com.whxiong.work01;

public class CurrentTime {
    String year;
       String mooth;
       String date;
       String hour;//小时
       String minutes;//分钟
       String second;//秒     
public void show1(){
 System.out.println("当前时间是："+(year+mooth+date+hour+minutes+second));
}
      
 
 
 **********************************************************8

import java.util.*;
public class Hero {
 Scanner input=new Scanner(System.in);
  String heroName;
  double heroLife;
  String monsterName;//monster》》》》怪物
  double monsterLife;//怪物生命
  String monsterType;//怪物类型
  String weaponsName;//weapons》》》》武器
  double weaponsDamage;//damage》》》》攻击力，武器攻击力
 public void show2() {
  System.out.println("输入英雄姓名:");
   heroName=input.next();
   System.out.println("输入英雄生命值:");
   heroLife=input.nextDouble();
  System.out.println("输入怪物名字:");
   monsterName=input.next();
  System.out.println("输入怪物生命值:");
   monsterLife=input.nextDouble();
  System.out.println("输入怪物类型:");
   monsterType=input.next();
  System.out.println("输入武器名:");
   weaponsName=input.next();
  System.out.println("输入武器攻击力:");
   weaponsDamage=input.nextDouble();
  System.out.println("我是英雄，我的基本信息如下：");
  System.out.println("姓名："+heroName+",生命值："+heroLife);
  System.out.println("我是武器，我的基本信息如下：");
  System.out.println("武器名："+weaponsName+",攻击力："+weaponsDamage);
  System.out.println("我是怪物，我的基本信息如下：");
  System.out.println("姓名："+monsterName+",生命值："+monsterLife+",类型："+monsterType);

********************************************

public class Work01 {

/**
  * @param args
  */
 public static void main(String[] args) {
  System.out.println("第二题");
  System.out.println("******************************");
  Calculator calculator = new Calculator();
  calculator.show();
  
  System.out.println("\n");
  System.out.println("第三题");
  System.out.println("******************************");
  CurrentTime currentTime = new CurrentTime();
  currentTime.year = "2015年";
  currentTime.mooth = "5月";
  currentTime.date = "12日";
  currentTime.hour = "10点";
  currentTime.minutes = "11分";
  currentTime.second = "00秒";
  currentTime.show1();
  
  System.out.println("\n");
  System.out.println("第六题");
  System.out.println("******************************");
  System.out.println("\n");
  Hero hero = new Hero();
  hero.show2();