add java client

client-java/.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml

client-java/.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_16" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

client-java/.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/client-java.iml" filepath="$PROJECT_DIR$/client-java.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

client-java/.idea/runConfigurations.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file

client-java/.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

client-java/client-java.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

client-java/src/Main.java

+import java.io.*;
+import java.net.Socket;
+import java.net.UnknownHostException;
+import java.util.Scanner;
+
+public class Main {
+
+    private static void usage() {
+        System.out.println("usage : ");
+        System.out.println("\t client [ip] [port]");
+    }
+
+    private static int menu(String ip) {
+        System.out.println("──────────────────" + ip + "─────────────────");
+        System.out.println("1) Size");
+        System.out.println("2) Sort");
+        System.out.println("3) Exit");
+
+        Scanner scanner = new Scanner(System.in);
+        return scanner.nextInt();
+    }
+
+    private static void loop(String ip, int port){
+        Socket socketOfClient = null;
+        BufferedWriter os = null;
+        BufferedReader is = null;
+
+        try {
+            socketOfClient = new Socket(ip, port);
+
+            // Create output stream at the client (to send data to the server)
+            os = new BufferedWriter(new OutputStreamWriter(socketOfClient.getOutputStream()));
+
+
+            // Input stream at Client (Receive data from the server).
+            is = new BufferedReader(new InputStreamReader(socketOfClient.getInputStream()));
+
+        } catch (UnknownHostException e) {
+            System.err.println("Don't know about host " + ip);
+            return;
+        } catch (IOException e) {
+            System.err.println("Couldn't get I/O for the connection to " + ip);
+            return;
+        }
+
+        try {
+            // Write data to the output stream of the Client Socket.
+            os.write("HELO");
+
+            // End of line
+            os.newLine();
+
+            // Flush data.
+            os.flush();
+            os.write("I am Tom Cat");
+            os.newLine();
+            os.flush();
+            os.write("QUIT");
+            os.newLine();
+            os.flush();
+
+
+
+            // Read data sent from the server.
+            // By reading the input stream of the Client Socket.
+            String responseLine;
+            while ((responseLine = is.readLine()) != null) {
+                System.out.println("Server: " + responseLine);
+                if (responseLine.indexOf("OK") != -1) {
+                    break;
+                }
+            }
+
+            os.close();
+            is.close();
+            socketOfClient.close();
+        } catch (UnknownHostException e) {
+            System.err.println("Trying to connect to unknown host: " + e);
+        } catch (IOException e) {
+            System.err.println("IOException:  " + e);
+        }
+
+
+    }
+
+
+
+    public static void main(String[] args) {
+        if (args.length != 2) {
+            usage();
+            return;
+        }
+        System.out.println("Connecting to " + args[0] + ":" + args[1]);
+        loop(args[0], Integer.parseInt(args[1]));
+    }
+}