java鏈接超時異常

import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class SocketTest {
	public static void main(String[] args) throws Exception {
		sys();
		Socket s = new Socket();
		// java socket 編程出現超時異常SocketTimeoutException，兩個地方可能出現，一個是connect的時候，一個讀的時候
		s.setSoTimeout(2000);// 這個設置是用來設置讀的超時時間
		s.connect(new InetSocketAddress("www.baidu.com", 80),30000);// 用來設置connect的超時時間
		Socket s2 = new Socket("www.baidu.com", 80);
		try{
			System.out.println("connect");
			InputStream is = s.getInputStream();
			Scanner scan = new Scanner(is);
			while (scan.hasNext()) {
				System.out.println("in");
				String line = scan.next();
				System.out.println(line);
			}
		}catch(Exception e){
			e.printStackTrace();
		}
	}
	
	
	public static void sys(){
		System.out.println("gggg");
	}
}