Calculations Based on Selected Radio Button

[Melinda Deering]

Hello All,

I am working on an assignment which calculates different pay rates based on the selection of a radio button. I'm okay with the default one (FIRST), but am unsure of how to base a different calculation on the other two radio buttons (SECOND and THIRD). I'll include what I have below...if anyone could point me in the right direction I would appreciate it.

import javax.swing.*;  //gives you textboxes
import java.awt.*;    //gives you math
import java.awt.event.*;   //gives you events

public class Ch14SimpleGuiMath extends JFrame implements ActionListener, ItemListener{
//implements allows you to indicate that you are using listener logic
	/**
	 * 
	 */
//	private static final long serialVersionUID = 1L;
	
	//constants for size of frame
	private static final int FRAME_WIDTH = 250;
	private static final int FRAME_HEIGHT = 400;

	
	private JLabel num1Label;   //hours worked
	private JLabel num2Label;	//pay rate
	
	private JTextField num1Field;  //where hours worked is inputted
	private JTextField num2Field;  //where pay rate is inputted

	private JButton compute;

	private JLabel totallabel;   //"Your Pay is:"
	private JTextField total;	//Pay total
	
	
	ButtonGroup colorGroup;  //colorGroup is just a name
	
	private JRadioButton first;
	private JRadioButton second;
	private JRadioButton third;
	
	public static void main(String[] args) {
		
	Ch14SimpleGuiMath frame = new Ch14SimpleGuiMath();  
	frame.setVisible(true);
	}
public Ch14SimpleGuiMath() {
	
	setSize(FRAME_WIDTH, FRAME_HEIGHT);
	setResizable(false);   //so user cannot resize
	setBackground(Color.LIGHT_GRAY);
	setTitle("I W Outlet");   //Title Bar
		
	addComponents(getContentPane());  //creates container (Container contentPane)

	setDefaultCloseOperation(EXIT_ON_CLOSE);  //you need this so you can close if you want to
}
private void addComponents(Container contentPane) {

	contentPane.setLayout(new FlowLayout());  
	
//	 Create and place the Labels and TextFields
	
	colorGroup = new ButtonGroup();	

//all the stuff below defines radio buttons
	
	first = new JRadioButton("FIRST");
	first.setSelected(true);	//sets this as default
	first.addItemListener(this);  //item listener because it's a radio button
	colorGroup.add(first);   //adds button to colorGroup
	contentPane.add(first);  //adds button to pane
	
	second = new JRadioButton("SECOND");
	second.addItemListener(this);
	colorGroup.add(second);
	contentPane.add(second);
	
	third = new JRadioButton("THIRD");
	third.addItemListener(this);
	colorGroup.add(third);
	contentPane.add(third);
	
//This does the label 
	num1Label = new JLabel("Please enter the hours worked");
	
	contentPane.add(num1Label);  //adds label to container
	
	num1Field = new JTextField(20);
	
	contentPane.add(num1Field);
	
	num2Label = new JLabel("Please enter pay rate");
	
	contentPane.add(num2Label);
	
	num2Field = new JTextField(20);
	
	contentPane.add(num2Field);
	
//	 Add the Compute button and label
	compute = new JButton("       COMPUTE THE RATE      "); //Note the padding!
		
	compute.addActionListener(this);
	contentPane.add(compute);
	
	totallabel = new JLabel("Your Pay is:");
	
	contentPane.add(totallabel);
	
	total = new JTextField(20);
	total.setBackground(Color.LIGHT_GRAY);
		
	contentPane.add(total);
}
//event logic
	public void actionPerformed(ActionEvent event) {
	
		int num1 = 0, diff = 0;
		double sum = 0;
		double num2 = 0;
		String command = event.getActionCommand();
				
		if (command.equals("       COMPUTE THE RATE      "))//MUST match padding!  Use Copy.
		{
	
		num1 = Integer.parseInt(num1Field.getText());
		num2 = Double.parseDouble(num2Field.getText());
	
		sum = num1 * num2;
	
		total.setText(new Double(sum).toString());
		}
		
//		if (command.equals("COMPUTE THE DIFFERENCE"))
//		{
	
		num1 = Integer.parseInt(num1Field.getText());
		num2 = Double.parseDouble(num2Field.getText());
	
//		diff = num1 - num2;
	
	total.setText(new Integer(diff).toString());  //converts to string so it can go back in the box
		}
	}

	public void itemStateChanged(ItemEvent event){
		if ((JRadioButton) event.getSource()== first){
			if (event.getStateChange()== ItemEvent.SELECTED){
				total.setBackground(Color.WHITE);	//in lab, this will dictate regular		 
		}	
	if ((JRadioButton) event.getSource()== second){
		if (event.getStateChange()== ItemEvent.SELECTED){
			total.setBackground(Color.CYAN);   //Should dictate second shift pay
		
	}
	

if ((JRadioButton) event.getSource()== third){
	if (event.getStateChange()== ItemEvent.SELECTED){
		total.setBackground(Color.YELLOW);   //should dictate third shift pay
		
}

	}
}
	}	

[Rob Spoor]

Please Use Code Tags. I've added them for you this time.

[Melinda Deering]

I apologize!

-Melinda

[Michael Dunn]

click the various radioButtons to see the textfiled background change color

    
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

class Ch14SimpleGuiMath extends JFrame implements ActionListener{// ItemListener{

Color[] color = {Color.WHITE,Color.CYAN,Color.YELLOW};
  private static final int FRAME_WIDTH = 250;
  private static final int FRAME_HEIGHT = 400;
  private JLabel num1Label;
  private JLabel num2Label;
  private JTextField num1Field;
  private JTextField num2Field;
  private JButton compute;
  private JLabel totallabel;
  private JTextField total;
  ButtonGroup colorGroup;
  private JRadioButton first;
  private JRadioButton second;
  private JRadioButton third;
  public static void main(String[] args) {
    Ch14SimpleGuiMath frame = new Ch14SimpleGuiMath();
    frame.setVisible(true);
  }
  public Ch14SimpleGuiMath() {
    setSize(FRAME_WIDTH, FRAME_HEIGHT);
    setResizable(false);
    setBackground(Color.LIGHT_GRAY);
    setTitle("I W Outlet");
    addComponents(getContentPane());
    setDefaultCloseOperation(EXIT_ON_CLOSE);
  }
  private void addComponents(Container contentPane) {
    contentPane.setLayout(new FlowLayout());
    colorGroup = new ButtonGroup();
    first = new JRadioButton("FIRST");
    first.setSelected(true);
//first.addItemListener(this);
first.addActionListener(this);
first.setActionCommand("0");
    colorGroup.add(first);
    contentPane.add(first);
    second = new JRadioButton("SECOND");
//second.addItemListener(this);
second.addActionListener(this);
second.setActionCommand("1");
    colorGroup.add(second);
    contentPane.add(second);
    third = new JRadioButton("THIRD");
//third.addItemListener(this);
third.addActionListener(this);
third.setActionCommand("2");
    colorGroup.add(third);
    contentPane.add(third);
    num1Label = new JLabel("Please enter the hours worked");
    contentPane.add(num1Label);
    num1Field = new JTextField(20);
    contentPane.add(num1Field);
    num2Label = new JLabel("Please enter pay rate");
    contentPane.add(num2Label);
    num2Field = new JTextField(20);
    contentPane.add(num2Field);
    compute = new JButton("       COMPUTE THE RATE      ");
    compute.addActionListener(this);
    contentPane.add(compute);
    totallabel = new JLabel("Your Pay is:");
    contentPane.add(totallabel);
    total = new JTextField(20);
//total.setBackground(Color.LIGHT_GRAY);
total.setBackground(color[0]);//to match the selected radiobutton
    contentPane.add(total);
  }
  public void actionPerformed(ActionEvent event) {
    Object source = event.getSource();
    if(source == compute)
    {
      int num1 = Integer.parseInt(num1Field.getText());
      double num2 = Double.parseDouble(num2Field.getText());
      double sum = num1 * num2;
      total.setText(new Double(sum).toString());
    }
    else
    {
      int index = Integer.parseInt(((JRadioButton)source).getActionCommand());
      total.setBackground(color[index]);
    }
  }
}

if you want to set it up for the radioButtons to determine the pay rate, do it similar to what I've done for colors
double[] payRates = {15.1,25.2,35.3};etc
double payRate = payRates[0];//to match 'FIRST' being selected at startup

then in actionPerformed
payRate = payRates[index];

[Melinda Deering]

Wow! You made me think of that in a completely different way. Thanks very much!

Melinda