URL物件呼叫InputStream openStream() 方法可以返回一個輸入流，該輸入流指向URL物件包含的資源。通過該輸入流可以將伺服器上的資訊列印到客戶端。
Main.java

package URL;

import java.util.Scanner;
import java.net.*;

public class Main {
    public static void main(String []args){
        Scanner in = new Scanner(System.in);
        URL url;
        Thread readURL;
        Look look = new
 
 Look();
        System.out.println("輸入URL資源");
        String source = in.nextLine();
        try {
            url = new URL(source);
            look.setURL(url);
            readURL = new Thread(look);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        readURL = new
 
 Thread(look);
        readURL.start();
    }
}

Look.java

package URL;

import java.io.IOException;
import java.io.InputStream;
import java.net.*;

public class Look implements Runnable{
    URL url;
    public void setURL(URL url){
        this.url = url;
    }
    public void run(){
        try
 
 {
            InputStream in = url.openStream();
            byte [] b = new byte[1024];
            int n = -1;
            while((n = in.read(b)) != -1){
                String str = new String(b,0,n);
                System.out.println(str);
            }
        } catch (IOException e) {
            System.out.println(e);
        }

    }
}

例如抓取百度的資源: