我也赞成用文本编辑器+命令行运行好些,eclipse让人变懒了

import java.util.Scanner;
public class Scan1
{
    public static void main(String args[])
    {
        Scanner scann=new Scanner(System.in);
        System.out.println("Please scan aword");
        int a=scann.nextInt();
               System.out.println(a);
        }
    }//这个scanner输入在运行后就可以输入了，但是他不能输入“空格”,用下面一个则可以输入空格，及多个字符。
import *
public class Scan1{
      public static void main(String args[]) throws IOException
        {
            BufferedReader Scan=new BufferedReader(new InputStreamReader(System.in))
                String a=Scan.readLine();
            System.out.println("Please scan aword");
              System.out.println(a);
      }
}