从键盘输入一串连续的数字,判断输出是否为电话号码java代码

dianhuahao.java
import java.util.Scanner;
public class dianhuahao {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入手机号(仅限137/138/139开头)");
        String number = scanner.next();
        String regex = "13[789]{1}[0-9]{8}";
        if (number.matches(regex)){
            System.out.println("是电话号码");
        }
        else
            System.out.println("不是电话号码");
    }
}

运行结果：