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DataInputStream

import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.Socket; public class MainClass {   public static void main(String[] args) throws Exception {     String serverName = args[0];     int port = Integer.parseInt(args[1]);     try {       System.out.println("Connecting to " + serverName + " on port " + port);       Socket client = new Socket(serverName, port);       System.out.println("Just connected to " + client.getRemoteSocketAddress());       OutputStream outToServer = client.getOutputStream();       DataOutputStream out = new DataOutputStream(outToServer);       out.writeUTF("Hello from " + client.getLocalSocketAddress());       InputStream inFromServer = client.getInputStream();       DataInputStream in = new DataInputStream(inFromServer);       System.out.println("Server says " + in.readUTF());       client.close();     } catch (IOException e) {       e.printStackTrace();     }   } }