以下代码存在错误,请找出:package Y; import java.io.*; import java.net.*; import java.util.*; public class Shiyan5Client { public static void main(String[] args) { Scanner sc = new Scanner(System.in); Socket mysocket = null; DataInputStream in = null; DataOutputStream out = null; Thread timeData; TellTime time = null; try { mysocket = new Socket(); time = new TellTime(); timeData = new Thread(time); System.out.println("输入服务器IP:"); String IP = sc.nextLine(); System.out.println("输入端口号:"); int port = sc.nextInt(); if (mysocket.isConnected()) {} else { InetAddress address = InetAddress.getByName(IP); InetSocketAddress socketAddress = new InetSocketAddress(IP, port); mysocket.connect(socketAddress); in = new DataInputStream(mysocket.getInputStream()); out = new DataOutputStream(mysocket.getOutputStream()); time.setDataInputStream(in); timeData.start(); System.out.println("请输入服务:"); } } catch (Exception e) { System.out.println("服务器已断开:"+e); // TODO: handle exception } while (sc.hasNext()) { try { String service = sc.next(); out.writeUTF(service); } catch (Exception e) { // TODO: handle exception } try { mysocket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }
时间: 2024-01-15 11:02:49 浏览: 30
代码中存在错误,具体如下:
1. 在if语句中,使用了mysocket.isConnected()来判断是否连接成功,但是mysocket并没有进行连接,因此这个判断是无意义的。
2. 在输入完端口号后,应该使用sc.nextLine()来读取回车符,否则会影响后面的输入。
3. 在输入服务之前应该先使用sc.nextLine()读取回车符,否则会出现跳过输入服务的情况。
4. 在while循环中,应该使用sc.hasNextLine()来判断是否还有输入,否则会出现输入不完整的情况。
5. 在while循环中,应该将关闭socket的代码放在循环外部,否则会出现关闭socket的操作被多次执行的情况。
6. 在捕获异常时,应该处理异常,而不是使用注释将异常忽略掉。
修改后的代码如下:
```
package Y;
import java.io.*;
import java.net.*;
import java.util.*;
public class Shiyan5Client {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Socket mysocket = null;
DataInputStream in = null;
DataOutputStream out = null;
Thread timeData;
TellTime time = null;
try {
mysocket = new Socket();
time = new TellTime();
timeData = new Thread(time);
System.out.println("输入服务器IP:");
String IP = sc.nextLine();
System.out.println("输入端口号:");
int port = sc.nextInt();
sc.nextLine(); // 读取回车符
InetAddress address = InetAddress.getByName(IP);
InetSocketAddress socketAddress = new InetSocketAddress(address, port);
mysocket.connect(socketAddress);
in = new DataInputStream(mysocket.getInputStream());
out = new DataOutputStream(mysocket.getOutputStream());
time.setDataInputStream(in);
timeData.start();
System.out.println("请输入服务:");
while (sc.hasNextLine()) {
String service = sc.nextLine();
out.writeUTF(service);
}
} catch (Exception e) {
System.out.println("服务器已断开:"+e);
e.printStackTrace();
} finally {
try {
if (mysocket != null) {
mysocket.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
```