Java/com/study/demo8/TCPClient.java

package com.study.demo8;

import java.io.PrintWriter;
import java.net.Socket;

public class TCPClient {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost", 8888);
            System.out.println("Connected to server.");

            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
            out.println("Hello Server");
            System.out.println("Sent message to server.");

            out.close();
            socket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}