用java语言写一个判断java文件名与邮箱格式是否正确的代码

以下是判断Java文件名与邮箱格式是否正确的Java代码：

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] args) {
        String fileName = "HelloWorld.java";
        String email = "example@example.com";

        if (isValidJavaFileName(fileName)) {
            System.out.println("Java文件名格式正确");
        } else {
            System.out.println("Java文件名格式不正确");
        }

        if (isValidEmail(email)) {
            System.out.println("邮箱格式正确");
        } else {
            System.out.println("邮箱格式不正确");
        }
    }

    // 判断Java文件名是否正确
    public static boolean isValidJavaFileName(String fileName) {
        Pattern pattern = Pattern.compile("^[a-zA-Z_$][a-zA-Z\\d_$]*\\.java$");
        Matcher matcher = pattern.matcher(fileName);
        return matcher.matches();
    }

    // 判断邮箱格式是否正确
    public static boolean isValidEmail(String email) {
        Pattern pattern = Pattern.compile("^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\\.[a-zA-Z0-9_-]+)+$");
        Matcher matcher = pattern.matcher(email);
        return matcher.matches();
    }
}