Wg2pNJX6

1importjavax.swing.*;
2importjava.awt.event.*;
3import java.io.*;
4importjavax.crypto.Cipher;
5importjavax.crypto.KeyGenerator;
6importjavax.crypto.SecretKey;
7publicclass Des {
8	privatestatic Cipher encryptCipher;
9	static String filepath;
10	staticJFrameframe;
11	publicstaticvoid main(String[] args) {
12	frame=newJFrame();
13		JButton b1=newJButton("CHOOSE YOUR FILE");
14		frame.setLayout(null);
15		frame.setSize(500, 500);
16		b1.setBounds(250,250,300,50);
17			
18		frame.add(b1);
19		b1.addActionListener(newActionListener(){
20			publicvoidactionPerformed(ActionEvent ae){
21				JFileChooserfilechoose= newJFileChooser();
22				filechoose.setCurrentDirectory(new
23File(System.getProperty("user.dir")));                   
24				int result = filechoose.showOpenDialog(frame);
25				if(result==JFileChooser.APPROVE_OPTION){
26				File selectedFile = filechoose.getSelectedFile();
27				filepath= selectedFile.getAbsolutePath();
28				System.out.println(filepath);  
29				FileInputStream f1 = null;
30					try {
31						f1 = newFileInputStream(filepath);
32					} catch (FileNotFoundException e) {
33						
34						e.printStackTrace();
35					}
36				
37					String str=newString();
38					intnumRead = 0;
39					try {
40						while ((numRead = f1.read()) >= 0) {
41							System.out.print((char)numRead);
42							str=str+(char)(numRead);
43						}
44					} catch (IOException e) {
45					
46						e.printStackTrace();
47					}
48					encryption(str);
49				                }
50			                 }
51		                  }
52		                  );
53		frame.setVisible(true);
54
55	                        }
56
57	publicstaticvoid encryption(String str){
58try{
59			// create SecretKey using KeyGenerator			
60	SecretKey key =  KeyGenerator.getInstance("DES").generateKey();					
61	     // get Cipher instance and initiate in encrypt mode
62	encryptCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
63	encryptCipher.init(Cipher.ENCRYPT_MODE, key);
64						
65	byte[] utf8 = str.getBytes();
66	System.out.println(utf8);
67	byte[] enc = encryptCipher.doFinal(utf8);
68	System.out.println("Encrypted form:: "+enc);
69	    // get Cipher instance and initiate in decrypt mode			encryptCipher.init(Cipher.DECRYPT_MODE, key);
70					
71	byte[] dec=encryptCipher.doFinal(enc);
72	System.out.println("Text Decryted : " + new String(dec));
73	}
74		catch(Exception e){
75			System.out.print(e);
76		}
77	}
78}