java 逗号拼接字符串

逗号拼接字符串

可以使用String类的静态方法join()来实现这个功能，示例代码如下：

```java
public class PhoneNumbers {
    public static void main(String[] args) {
        String phoneNumber1 = "18801083588";
        String phoneNumber2 = "15709106355";
        String phoneNumber3 = "18001931933";

        String phoneNumberString = String.join(",", phoneNumber1, phoneNumber2, phoneNumber3);

        System.out.println(phoneNumberString);
    }
}
```
输出结果为：

```text
18801083576,15709106355,18001931933
```