Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Please help I am having trouble with my gui for my encryption and decryption java code The encryption and decryption java code is below and the gui file is in the photos import java.util.*;
public class Main
{   
    public static boolean isALetter(char letter){
        if( (letter >= 'a' && letter = 'A' && letter =-32767 && encryptKey
GUI.java B
1 import java.awt.*;
2 import javax.swing. *;
3 import java.awt.event. *;
4
5
class Main extends JFrame implements ActionListener {
6
7
JButton btnClear, btnEn, btnDe;
8 JTextField txtIn, txtOut;
JLabel lblEn, lblDe;
9
10
11 ▼
public Main () {
12
13
super("Super Spy Encryption");
14
15
16
btnClear = new JButton("Clear");
btnEn = new JButton("Encrypt");
btnDe= new JButton("Decrypt");
17
18
19
20
btnClear. addActionListener(this);
btnEn. addActionListener(this);
btnDe.
21
ionListener(this);
22
23
txtIn= new JTextField (50);
24
txtOut= new JTextField(50);
25
26
lblEn= new JLabel("Type your message to Encrypt here");
lblDe= new JLabel("Type your message to Decrypt here");
27
28
29
set Layout(new GridLayout(7,1));
30
add (lblen);
31
add (txtIn);
32
add (lblDe);
33
add (txtOut);
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add (btnEn);
35
add (btnDe);
36
add (btnClear);
37
38
setSize(300, 300);
39
setVisible(true);
40
41
} // Constructor
42
public void action Performed (ActionEvent e)
43 ▼
{
44 // check which button was clicked
45 if (e.getSource () == btnDe)
expand button
Transcribed Image Text:GUI.java B 1 import java.awt.*; 2 import javax.swing. *; 3 import java.awt.event. *; 4 5 class Main extends JFrame implements ActionListener { 6 7 JButton btnClear, btnEn, btnDe; 8 JTextField txtIn, txtOut; JLabel lblEn, lblDe; 9 10 11 ▼ public Main () { 12 13 super("Super Spy Encryption"); 14 15 16 btnClear = new JButton("Clear"); btnEn = new JButton("Encrypt"); btnDe= new JButton("Decrypt"); 17 18 19 20 btnClear. addActionListener(this); btnEn. addActionListener(this); btnDe. 21 ionListener(this); 22 23 txtIn= new JTextField (50); 24 txtOut= new JTextField(50); 25 26 lblEn= new JLabel("Type your message to Encrypt here"); lblDe= new JLabel("Type your message to Decrypt here"); 27 28 29 set Layout(new GridLayout(7,1)); 30 add (lblen); 31 add (txtIn); 32 add (lblDe); 33 add (txtOut); 34 add (btnEn); 35 add (btnDe); 36 add (btnClear); 37 38 setSize(300, 300); 39 setVisible(true); 40 41 } // Constructor 42 public void action Performed (ActionEvent e) 43 ▼ { 44 // check which button was clicked 45 if (e.getSource () == btnDe)
46 ▼ {
47 // declare strings for input and output
48 String phraseIn, phraseOut;
49 phraseIn = txtIn.getText (); // get the input string
50 phraseOut = phraseIn.reverse();
51 txtOut.setText (phraseOut);
52 }
==
btnClear)
53 else if (e.getSource ()
54▼ {
55 txtIn.setText (""); // clear both strings
56 txtOut.setText ("");
57
58
}
59
}
60
public static void main(String[] args)
61 ▼
{
62
new Main();
63
}
64 }
expand button
Transcribed Image Text:46 ▼ { 47 // declare strings for input and output 48 String phraseIn, phraseOut; 49 phraseIn = txtIn.getText (); // get the input string 50 phraseOut = phraseIn.reverse(); 51 txtOut.setText (phraseOut); 52 } == btnClear) 53 else if (e.getSource () 54▼ { 55 txtIn.setText (""); // clear both strings 56 txtOut.setText (""); 57 58 } 59 } 60 public static void main(String[] args) 61 ▼ { 62 new Main(); 63 } 64 }
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