java程序_获取端口

import java.net.ServerSocket;public class TestNetUtil { public static void main(String [] args) { try { ServerSocket socket = new ServerSocket(0); int port = socket.getLocalPort(); socket.close(); } catch (Exception e) { System.out.println(e.getMessage()); } }}

执行javac TestNetUtil.java，会生成TestNetUtil.class 然后执行java TestNetUtil

只有一条路不能选择——那就是放弃的路;