import java.util.Scanner;public class LuckGuess { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scan = new Scanner(System.in);
int rn = (int)(Math.random()*100);
System.out.println("请猜一个0到99的数:");
while(true)
{
int gn = 0;
gn = scan.nextInt();
// TODO Auto-generated catch block
System.out.println("你输入的是:"+scan.next());
System.out.println("只能猜数字,请重新输入:");
continue;
if(rn == gn)
{
System.out.println("太强了,猜对了。");
break;
}else if(rn > gn){
System.out.println("你猜的数小了。");
}else{
System.out.println("你猜的数大了。");
}
}
}}
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scan = new Scanner(System.in);
int rn = (int)(Math.random()*100);
System.out.println("请猜一个0到99的数:");
while(true)
{
int gn = 0;
gn = scan.nextInt();
// TODO Auto-generated catch block
System.out.println("你输入的是:"+scan.next());
System.out.println("只能猜数字,请重新输入:");
continue;
if(rn == gn)
{
System.out.println("太强了,猜对了。");
break;
}else if(rn > gn){
System.out.println("你猜的数小了。");
}else{
System.out.println("你猜的数大了。");
}
}
}}
import java.util.Scanner;public class LuckGuess { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scan = new Scanner(System.in);
int rn = (int)(Math.random()*100);
System.out.println("请猜一个0到99的数:");
while(true)
{
int gn = 0;
try {
gn = scan.nextInt();
} catch (RuntimeException e) {
// TODO Auto-generated catch block
System.out.println("你输入的是:"+scan.next());
System.out.println("只能猜数字,请重新输入:");
continue;
}
if(rn == gn)
{
System.out.println("太强了,猜对了。");
break;
}else if(rn > gn){
System.out.println("你猜的数小了。");
}else{
System.out.println("你猜的数大了。");
}
}
}}不知道为什么加个try {catch (RuntimeException e) {就可以了撒
InputMismatchException - 如果下一个标记与 Integer 正则表达式不匹配,或者超出范围
NoSuchElementException - 如果输入信息已耗尽
IllegalStateException - 如果此扫描器已关闭RuntimeException是这三个异常类的父类,所以用RuntimeException就全部捕捉到了