Calculator want Calculate!

Discussion in 'Java' started by xxxxJTxxxx, Feb 13, 2009.

  1. xxxxJTxxxx

    xxxxJTxxxx New Member

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    Hello everyone I'm new to the fourm as you all can see. I'm a beginner programer I'm trying to learn Java. I'm work on this simple program to help run my small business. I maintain fish tanks around town. Well I'm trying to create a simple price calculator to help making adding things up and adding the tax. Here is my diagram, and the class that I created and the program.

    (label) Price of item: (textField)[input box]
    (label) Number of items: (textField)[input box]
    (button)[computeButton]
    (label) Total Price: (textField)[input box] (uneditable) (currency format)
    (label) Total Tax: (textField)[input box] (uneditable) (currency format)
    (label) Total Cost: (textField)[input box] (uneditable) (currency format)

    Code:
    [FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]1 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]import[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] java.awt.*;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]2 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]import[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] java.awt.event.*;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]3 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]import[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] javax.swing.*;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]4 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]5 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]6 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]public[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]class[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] CalculatePanel [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]extends[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JPanel {[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]7 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]8 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]9 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]10 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]private[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]int[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] Calculate;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]11 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]private[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JButton push;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]12 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]private[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JLabel label, label2, label3, label4, label5;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]13 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]private[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JTextField box, box2, box3, box4, box5;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]14 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]15 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]public[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] CalculatePanel () {[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]16 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]17 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]push = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JButton ([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]"Compute!"[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]18 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]push.addActionListener ([/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] ButtonListener());[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]19 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]20 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]label = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JLabel ([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]"Calculate: "[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] + Calculate); [/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]21 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]22 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]label = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JLabel ([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]"Price of item: "[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]23 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]label2 = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JLabel ([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]"Number of items: "[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]24 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]label3 = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JLabel ([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]"Total Price: "[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]25 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]label4 = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JLabel ([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]"Total Tax: "[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]26 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]label5 = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JLabel ([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]"Total Cost: "[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]27 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]28 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]29 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JTextField(5);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]30 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box2 = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JTextField(5);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]31 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box3 = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JTextField(5);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]32 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box3.setEditable([/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]false[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]33 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box4 = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JTextField(5);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]34 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box5 = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JTextField(5);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]35 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box5.setEditable([/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]false[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]36 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]37 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]38 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (label);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]39 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (box);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]40 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (label2);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]41 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (box2);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]42 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (label3);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]43 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (box3);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]44 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (label4);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]45 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (box4);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]46 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (label5);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]47 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (box5);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]48 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]add (push);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]49 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]50 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]51 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]setPreferredSize ([/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] Dimension(190, 225));[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]52 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]setBackground (Color.cyan);}[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]53 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]54 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]public[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]class[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] ButtonListener [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]implements[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] ActionListener {[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]55 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]56 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]public[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]void[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] actionPerformed (ActionEvent event) {[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]57 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]58 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]int[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] p = Integer.parseInt(box.getText());[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]59 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]int[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] n = Integer.parseInt(box2.getText());[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]60 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]int[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] tp = Integer.parseInt(box3.getText());[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]61 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]int[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] tt = Integer.parseInt(box4.getText());[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]62 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]int[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] tc = Integer.parseInt(box5.getText());[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]63 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]int[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] Calculate = p * n + tp * tt;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]64 [/COLOR][/FONT][/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]65 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]Calculate++;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]66 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box3.setText([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]".07 "[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] + Calculate);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]67 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]box5.setText([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]" "[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] + Calculate); }[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]68 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]}[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]69 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]}[/FONT]
    The Program Runs But It Want Calculate.
    Code:
    [FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]1 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]import[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] javax.swing.JFrame;[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]2 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]3 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]public[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]class[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] Calculate {[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]4 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#fa6400][FONT=Courier New][COLOR=#fa6400]//-----------------------------------------------------------------[/COLOR][/FONT]
[/COLOR][/FONT][FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]5 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#fa6400][FONT=Courier New][COLOR=#fa6400]// Creates the main program frame.[/COLOR][/FONT]
[/COLOR][/FONT][FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]6 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#fa6400][FONT=Courier New][COLOR=#fa6400]//-----------------------------------------------------------------[/COLOR][/FONT]
[/COLOR][/FONT][FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]7 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]public[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]static[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]void[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] main (String[] args)[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]8 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]{[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]9 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]JFrame frame = [/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] JFrame ([/FONT][FONT=Courier New][COLOR=#00cb00][FONT=Courier New][COLOR=#00cb00]"Calculate"[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]10 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]11 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]12 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]frame.getContentPane().add([/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]new[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New] CalculatePanel());[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]13 [/COLOR][/FONT]
[FONT=Courier New][COLOR=#0000ff]14 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]frame.pack();[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]15 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]frame.setVisible([/FONT][FONT=Courier New][COLOR=#941edf][FONT=Courier New][COLOR=#941edf]true[/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]);[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]16 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]}[/FONT]
[FONT=Courier New][COLOR=#0000ff][FONT=Courier New][COLOR=#0000ff]17 [/COLOR][/FONT][/COLOR][/FONT][FONT=Courier New]}[/FONT]
    Can anyone Help!!
     
    xxxxJTxxxx, Feb 13, 2009
    SHARE #1
  2. gulliccj

    gulliccj New Member

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    You really should consider putting a "main" method in CalculatePanel(); This would mean less chance of failure. I am currently testing it. I will get back to you very soon.
     
    gulliccj, Feb 23, 2009
    SHARE #2
  3. gulliccj

    gulliccj New Member

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    for CalculatePanel.java, you were parsing empty JTextFields, Here is the NEW code:

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

 
 public class CalculatePanel extends JPanel {
 
 
 
 private int Calculate;
 private JButton push;
 private JLabel label, label2, label3, label4, label5;
 private JTextField box, box2, box3, box4, box5;
 
 public CalculatePanel () {
 
 push = new JButton ("Compute!");
 push.addActionListener (new ButtonListener());
 
 label = new JLabel ("Calculate: " + Calculate); 
 
 label = new JLabel ("Price of item: ");
 label2 = new JLabel ("Number of items: ");
 label3 = new JLabel ("Total Price: ");
 label4 = new JLabel ("Total Tax: ");
 label5 = new JLabel ("Total Cost: ");
 
 
 box = new JTextField(5);
 box2 = new JTextField(5);
 box3 = new JTextField(5);
 box3.setEditable(false);
 box4 = new JTextField(5);
 box5 = new JTextField(5);
 box5.setEditable(false);
 
 
 add (label);
 add (box);
 add (label2);
 add (box2);
 add (label3);
 add (box3);
 add (label4);
 add (box4);
 add (label5);
 add (box5);
 add (push);
 
 
 setPreferredSize (new Dimension(190, 225));
setBackground (Color.cyan);}
 
 public class ButtonListener implements ActionListener {
 
 public void actionPerformed (ActionEvent event) {
 
 double p = Double.parseDouble(box.getText());//price
 double n = Double.parseDouble(box2.getText());//number of items
  double tt = Double.parseDouble(box4.getText());//total tax
  
  /*
   *
   *ANSWER:
   *These two JTextFields are enabled(false), so you are parsing null.
   *
   */
 //int tp = Integer.parseInt(box3.getText());//total price
 //int tc = Integer.parseInt(box5.getText()); //total cost
 //int Calculate = p * n + tp * tt;
 double Calculate = p * n + tt;
 
 box3.setText(".07 " + Calculate);
 box5.setText(" " + Calculate); }
 }
 }
    And for Calculate, NO CHANGES:
    HTML:
     import javax.swing.JFrame;
 
 public class Calculate {
 //-----------------------------------------------------------------
 // Creates the main program frame.
 //-----------------------------------------------------------------
 public static void main (String[] args)
 {
 JFrame frame = new JFrame ("Calculate");
 frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
 
 frame.getContentPane().add(new CalculatePanel());
 
 frame.pack();
 frame.setVisible(true);
 }
 }
     
    gulliccj, Feb 23, 2009
    SHARE #3
  4. gulliccj

    gulliccj New Member

    Joined:
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    I hope I helped you. Have a nice day.
     
    gulliccj, Feb 23, 2009
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