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package day03;
import java.util.Scanner;
public class ErrorDemo {
public static void main(String[] args) {
Scanner sc =new Scanner(System.in);
while(true){
try {
int a = sc.nextInt();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
// sc.nextLine();
}
}
}
}
import java.util.Scanner;
public class ErrorDemo
{
public static void main(String[] args)
{
m();
}
public static void m()
{
System.out.println("请输入:");
Scanner sc = new Scanner(System.in);
while (sc.hasNext())
{
try
{
int a = sc.nextInt();
System.out.println(a);
}
catch (Exception e)
{
System.out.println("输入不合法");
m();
}
}
}
}
import java.util.*;
public class ScannerDemo {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while(sc.hasNext()){
try{
int i = sc.nextInt();
System.out.println(i);
}catch(InputMismatchException e){
System.out.println("请输入一个数字");
sc.next();
}
}
}
}