15章实例6

import java.util.Scanner;public class E {public static void main(String[] args) {boolean fileCorrect = false;// 标识文件名是否正确boolean emailCorrect = false;// 标识E-mail是否正确System.out.println("---欢迎进入作业提交系统---");Scanner input = new Scanner(System.in);System.out.println("请输入java文件名:");String fileName = input.next();System.out.println("请输入你的邮箱:");String email = input.next();// 检查文件名int index = fileName.lastIndexOf(".");// "."的位置if (index != -1&& index != 0&& fileName.substring(index + 1, fileName.length()).equals("java")) {fileCorrect = true;// 标识文件名正确} else {System.out.println("文件名无效!");}// 检查你的邮箱格式if (email.indexOf('@') != 1 && email.indexOf('.') > email.indexOf('@')) {emailCorrect = true;// 标识E-mail正确}else{System.out.println("E-mail无效!");}//输出检测结果if(fileCorrect&&emailCorrect){System.out.println("作业提交成功!");}else{System.out.println("作业提交失败!");}}}