Computers are playing an increasing role in education Implement a GUI program th

Question

Computers are playing an increasing role in education Implement a GUI program that helps first grade students to learn simple addition and substraction. Use Math random to produce two positive one-digit integers (numbers must be less than 10). It should then type a question such as: 5 + 3 = ? A card as shown in Fig 1 appears where the student is prompined to enter the answer. The program checks the students answer. If it is correct, print an encouragement statement with a Star as shown in Fig 2. If the answer is wrong, print the correct answer with a sad face as shown in Fig 3. After 5 questions show the student his total grade. Use different encouragement statements for the child such as {"Well done", "Good Job", "Excellent", "Amazing", ... etc} Use exceptional handling to handle the invalid user input such as entering letters instead of digits. Think of other possible exceptions.

Explanation / Answer

/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/

package teach_math;

/**
*
* @author TANAY
*/
public class NewJFrame extends javax.swing.JFrame {
int a,b,c,x;
/**
* Creates new form NewJFrame
*/
public NewJFrame() {
initComponents();
jLabel1.setText(String.valueOf(Math.random()*9));
jLabel3.setText(String.valueOf(Math.random()*9));
x=0;
}

/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jLabel4 = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

jLabel1.setText("jLabel1");

jLabel2.setText("jLabel2");

jLabel3.setText("jLabel3");

jTextField1.setText("jTextField1");

jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});

jLabel4.setText("jLabel4");

jLabel5.setText("jLabel5");

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(143, 143, 143)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton1)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(184, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel3)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(154, 154, 154)
.addComponent(jLabel1))
.addGroup(layout.createSequentialGroup()
.addGap(101, 101, 101)
.addComponent(jLabel2))))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel4, javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel5, javax.swing.GroupLayout.Alignment.TRAILING))
.addGap(75, 75, 75))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(37, 37, 37)
.addComponent(jLabel1)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(jLabel2))
.addGroup(layout.createSequentialGroup()
.addGap(26, 26, 26)
.addComponent(jLabel4)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel3)
.addComponent(jLabel5))
.addGap(51, 51, 51)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 54, Short.MAX_VALUE)
.addComponent(jButton1)
.addGap(41, 41, 41))
);

pack();
}// </editor-fold>

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {   
// TODO add your handling code here:
int d;
  
a=Integer.parseInt(jLabel1.getText());
b=Integer.parseInt(jLabel2.getText());
  
c=a+b;
d=Integer.parseInt(jTextField1.getText());
jLabel4.setText(String.valueOf(a)+"+"+String.valueOf(b)+"="+String.valueOf(d));
if(c==d)
{
  
  
if(x==0)
{
jLabel5.setText("Wel done");
}
if(x==1)
{
jLabel5.setText("Good Job");
}
if(x==2)
{
jLabel5.setText("Excellent");
}
if(x==3)
{
jLabel5.setText("Amazing");
}
if(x==4)
{
jLabel5.setText("Superb");
}
x++;
  
}
else
{
jLabel5.setText("You Failed"+String.valueOf(d));
  
  
  
  
}
  
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>

/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}

// Variables declaration - do not modify   
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JTextField jTextField1;
// End of variables declaration   
}

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