更新1.java

1.java

+import java.net.*;  
+import java.io.*;  
+  
+public class Client {  
+    public static void main(String[] args) throws IOException {  
+        String host = "localhost";  
+        int port = 12345;  
+        Socket socket = new Socket(host, port);  
+        System.out.println("Connected to server");  
+  
+        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);  
+        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));  
+        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));  
+  
+        String userInput;  
+        while ((userInput = stdIn.readLine()) != null) {  
+            out.println(userInput);  
+            System.out.println("Echo: " + in.readLine());  
+        }  
+  
+        out.close();  
+        in.close();  
+        stdIn.close();  
+        socket.close();  
+    }  
+}
+