java - How to do multiple tasks at once? -

how make download 2 3 files @ once , when 1 finishes picks another? right needs do, takes while if you're downloading 30 videos @ once, want download 2 or 3 @ time.

try {             url url;             byte[] buf;             int byteread, bytewritten = 0;             url = new url(getfinallocation(faddress));;             outstream = new bufferedoutputstream(new fileoutputstream(destinationdir + "\\" + localfilename));              ucon = url.openconnection();             = ucon.getinputstream();             buf = new byte[size];             while ((byteread = is.read(buf)) != -1) {                 outstream.write(buf, 0, byteread);                 bytewritten += byteread;             }             system.out.println("downloaded successfully.");             //system.out.println("file name:\"" + localfilename + "\"\nno ofbytes :" + bytewritten);         } catch (exception e) {             e.printstacktrace();         } {             try {                 is.close();                 outstream.close();             } catch (ioexception e) {                 e.printstacktrace();             }         }     } 

you add code class implements runnable. code go in method run(). (you need implement method per runnable interface.)

you create new threads , start them passing runnable.

thread thread = new thread(new runnableclass()); thread.start(); 

you'll need implement logic passing faddress string runnableclass. (via constructor, or method gets called before thread.start().)

does started?

edit - added example

public class main {      public static void main(string[] args) {          thread thread1 = new thread(new myrunnable("http://someaddress"));         thread1.start();          thread thread2 = new thread(new myrunnable("http://otheraddress"));         thread2.start();      }      public static class myrunnable implements runnable {          string address;          public myrunnable(string address) {             this.address = address;         }          @override         public void run() {             // code here can access address         }     } }