inputdata.java

首先提示用户选择玩法 玩法1：21选5 输入5个数（从1

package mypg;
import java.io.*;


public class InputData {
	private static String st;
	private static boolean err;
	public  static int iRead(){
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		err=false;
		do{
			System.out.flush();
			try{st=in.readLine();}
			catch(IOException e){
				System.out.println(e);
				System.exit(1);
			}
			if(st.length()==0)
				err=true;
			else
				try{return Integer.valueOf(st).intValue();}
			catch(NumberFormatException e){
				System.out.println(e);
				System.out.print("请重新输入一个整数");
				err=true;
			}
		}while(err);
		return Integer.valueOf(st).intValue();
	}

}