1 import javax.swing.*;
2 import java.awt.*;
3 import java.awt.event.*;
4 import java.util.regex.*;
5
6 class UpdateFrame extends JFrame
7 {
8 Container c;
9 JLabel lblRno , lblName;
10 JTextField txtRno, txtName;
11 JButton btnSave , btnBack;
12 JPanel p1,p2;
13
14 UpdateFrame()
15 {
16 c = getContentPane();
17 c.setLayout(new BoxLayout(c , BoxLayout.Y_AXIS));
18 c.setBackground(Color.orange);
19
20 p1 = new JPanel();
21 lblRno = new JLabel("Rno: ");
22 txtRno = new JTextField((4));
23 lblName = new JLabel("Name: ");
24 txtName = new JTextField((10));
25 p1.add(lblRno);
26 p1.add(txtRno);
27 p1.add(lblName);
28 p1.add(txtName);
29 p1.setBackground(Color.orange);
30 c.add(p1);
31
32 p2 = new JPanel();
33 btnSave = new JButton("Save");
34 btnSave.setBackground(Color.orange);
35 btnBack = new JButton("Back");
36 btnBack.setBackground(Color.orange);
37 p2.add(btnSave);
38 p2.add(btnBack);
39 c.add(p2);
40
41 setTitle("Update Student Info.");
42 setLocationRelativeTo(null);
43 setSize(500,400);
44 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
45 setVisible(true);
46
47
48 btnBack.addActionListener(new ActionListener(){
49 public void actionPerformed(ActionEvent ae){
50 MainFrame a = new MainFrame();
51 dispose();
52 }
53 });
54
55 btnSave.addActionListener(new ActionListener(){
56 public void actionPerformed(ActionEvent ae){
57 try{
58 String rno = txtRno.getText();
59 String name = txtName.getText();
60 DbHandler db = new DbHandler();
61 if( txtName.getText().isEmpty())
62 {
63 throw new InvalidFieldException();
64 }
65 if(Integer.parseInt(rno)<0)
66 {
67 throw new NumberGreaterException();
68 }
69 if(Pattern.matches("[a-zA-Z]+", name) == false){
70 throw new Exception();
71 }
72
73 db.UpdateStudent(Integer.parseInt(rno),name);
74 }
75 catch(NumberFormatException nfe)
76 {
77 JOptionPane.showMessageDialog(new JDialog(), "Please Enter Integer");
78 }
79 catch(NumberGreaterException nge)
80 {
81 JOptionPane.showMessageDialog(new JDialog(), "Number should be greater than 0");
82 }
83 catch(InvalidFieldException iae)
84 {
85 JOptionPane.showMessageDialog(new JDialog(), "Field(s) should not be blank");
86 }
87 catch(Exception e)
88 {
89 JOptionPane.showMessageDialog(new JDialog(), "Name should not contain Integers");
90 }
91
92 }
93 });
94
95 }
96
97 public static void main(String[] args)
98 {
99 UpdateFrame uf = new UpdateFrame();
100 }
101
102 }
