network packet analyser

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Java

import jpcap.*;
import jpcap.packet.Packet;
import jpcap.PacketReceiver;
import jpcap.JpcapCaptor; 
import jpcap.NetworkInterface; 
import jpcap.NetworkInterfaceAddress; 
import java.io.IOException; 
import java.util.Scanner; 
import javax.swing.JFrame;
public class PacketAnalyser {
    public static void main(String args[])throws java.io.IOException{
}

    /**
     * @param args the command line arguments
     */
    static String text="";
    public String capture(){
    	   
	try { 
		captor=JpcapCaptor.openDevice(devices[index], 65535, true, 20); 
		long[] packs = new long[20]; 
		int tcp = 0; 
		int udp = 1; 
		for(int j = 0;j<10;j++){ 
		long count1 = 0; 
		long count2 = 0; 
		captor.setFilter("tcp and ip", true); 
		for(int i=0;i<10;i++){ 
			  
		text1=text1+captor.getPacket()+"\n"; 
		if(captor.getPacket()!=null){count1++;}} 
		text1=text1+captor.dropped_packets + " packets dropped by kernel\n"; 
		text1=text1+count1+"\n"  ; 
		captor.setFilter("udp and ip", true); 
		for(int i=0;i<10;i++){ 
		text1=text1+captor.getPacket()+"\n"  ; 
		if(captor.getPacket()!=null){count2++;} 
		} 
		text1=text1+captor.dropped_packets + " packets dropped by kernel\n"; 
		text1=text1+count2+"\n"; 
		packs[tcp]=count1; 
		packs[udp]=count2; 
		tcp+=2; 
		udp+=2; 
		} 
		
	captor.close(); 
	return text1; }}
}

so while implementing and running this program i am finding error as "run:
java.lang.ExceptionInInitializerError
Caused by: java.lang.RuntimeException: Uncompilable source code - package jpcap.packet does not exist
at PacketAnalyser.<clinit>(PacketAnalyser.java:12)
Exception in thread "main" Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)".... i m not getting where [is my mistake .. so plz help