import net.jxta.peergroup.*; 
import net.jxta.peergroup.NetPeerGroupFactory; 
import net.jxta.peergroup.WorldPeerGroupFactory; 
import net.jxta.exception.PeerGroupException; 
 
public class HelloWorld { 
 
    static PeerGroup netPeerGroup = null; 
     
    public static void main(String args[]) { 
        System.out.println("Starting JXTA..."); 
        HelloWorld myapp = new HelloWorld(); 
        myapp.startJxta(); 
        System.out.println("Group ID = "+ netPeerGroup.getPeerGroupID().toString() ); 
        System.out.println("Peer name  = "+ netPeerGroup.getPeerGroupName() ); 
        System.out.println("Peer ID = "+ netPeerGroup.getPeerID().toString() ); 
        System.out.println(" Good Bye .... " ); 
        //對(duì)等點(diǎn)應(yīng)用 
        myapp.netPeerGroup.stopApp(); 
        System.exit(0); 
    } 
     
     
    private void startJxta() 
    { 
        try 
        {//創(chuàng)建默認(rèn)的JXTA NetPeerGroup 
            this.netPeerGroup =(new NetPeerGroupFactory()).getWeakInterface(); 
        }catch(Exception e ) 
        { 
            //如果出現(xiàn)異常，打印出錯(cuò)信息并退出 
            System.out.println("fatal error:group creation failure"); 
            e.printStackTrace(); 
            System.exit(1); 
        } 
    } 
}