Question

I'm currently working on Jframe and running into some issues getting it to run properly. I am required to have these 4 elements Principal amount(Text field and label) Interest rate (Text field and label) Submit button Monthly payment If anyone could give me a had it would be appreciated.

Answer 1

Here is the program in java

import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
class InterestCalculator extends JFrame implements ActionListener {
  

// create a frame
static JFrame f;
  
// create a textfield
static JTextField txtPrincipal, txtRate;
static JLabel lblPrincipal, lblRate, lblInterest;
  
// main function
public static void main(String args[])
{
// create a frame
f = new JFrame("Interest Calculator");
InterestCalculator c = new InterestCalculator();
// create a textfield
txtPrincipal = new JTextField(16);
txtRate = new JTextField(16);
       // create label field
       lblPrincipal=new JLabel("Principal Amount:");
       lblRate=new JLabel("Rate of Interest");
       lblInterest = new JLabel(" ");
// create number buttons and some operators
JButton butSubmit;
// create number buttons
butSubmit = new JButton("Calculate");
// create a panel
JPanel p = new JPanel();
// add action listeners
butSubmit.addActionListener(c);
  
// add elements to panel
p.add(lblPrincipal);
p.add(txtPrincipal);
p.add(lblRate);
p.add(txtRate);
p.add(lblInterest);
p.add(butSubmit);
  
// add panel to frame
f.add(p);
  
f.setSize(200, 220);
f.show();   
}
public void actionPerformed(ActionEvent e)
{
String s = e.getActionCommand();
if (s.equals("Calculate")) {
System.out.println("hurray");
lblInterest.setText("show calculated interest here");
}
}

}

Sample output:

Interest Calculator Principal Amount: 100 Rate of Interest show calculated interest here Calculate