怎么写一段永不停止的java代码？

import java.util.Scanner;

/*

 * @author LiuYanzhao

 */

public class Test {

    private static final String OPERATION_EXIT = "EXIT";

    public static void main(String[] args) {

        System.out.println("请开始您的输入，EXIT/E 退出");

        //怎么让程序一直运行

        Scanner scan = new Scanner(System.in);

        while(scan.hasNext()) {

            String in = scan.next().toString();

            if(OPERATION_EXIT.equals(in.toUpperCase())

                    || OPERATION_EXIT.substring(0, 1).equals(in.toUpperCase())) {

                System.out.println("您成功已退出！");

                break;

            }

            System.out.println("您输入的值："+in);

        }

    }

}