Java 实例 - 查看端口是否已使用
Java 教程
· 2019-02-11 20:12:24
以下实例演示了如何检测端口是否已经使用：
Main.java 文件
import java.net.*;
import java.io.*;
public class Main {
public static void main(String[] args) {
Socket Skt;
String host = "localhost";
if (args.length > 0) {
host = args[0];
}
for (int i = 0; i < 1024; i++) {
try {
System.out.println("查看 "+ i);
Skt = new Socket(host, i);
System.out.println("端口 " + i + " 已被使用");
}
catch (UnknownHostException e) {
System.out.println("Exception occured"+ e);
break;
}
catch (IOException e) {
}
}
}
}
以上代码运行输出结果为：
…… 查看 17 查看 18 查看 19 查看 20 查看 21 端口 21 已被使用 查看 22 查看 23 查看 24 ……
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