Number format Exception

[aortell24]

[SOLVED]Hello everyone I am getting a number format exception pointing to line 81 which on mine is the double annual Interest rate definition.I have looked through my book and I cant figuer out what I did wrong could some please take a look at this for me Thanks.

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.*;
/**
 * Created by IntelliJ IDEA.
 * User: aortell24
 * Date: 7/15/12
 * Time: 6:36 PM
 * To change this template use File | Settings | File Templates.
 */
public class Exercise34_01 extends JFrame{
    private JTextField _jtfAmount = new JTextField();
    private JTextField _jtfYears = new JTextField();
    private JTextField _jtfInterest = new JTextField();
    private JTextField _jtfValue = new JTextField();
    private JLabel _jlbAmount = new JLabel(" Interest Amount");
    private JLabel _jlbYears = new JLabel(" Years");
    private JLabel _jlbInterest = new JLabel(" Annual Interest Rate   ");
    private JLabel _jlbValue = new JLabel(" Future Value");
    private JPanel _jlbPanel = new JPanel();
    private JPanel _txtPanel = new JPanel();
    private JButton _jbtCalc = new JButton(" Calculate");
    private BoxLayout _txtPanelLayout;
    private BoxLayout _jlbPanelLayout;
    private JMenuBar _menuBar = new JMenuBar();
    private JMenu _opMenu = new JMenu("Operation");
    private JMenu _helpMenu = new JMenu("Help");
    
    public Exercise34_01()
    {
         //Layout
         this.setLayout(new BorderLayout());
        _txtPanelLayout = new BoxLayout(_txtPanel,BoxLayout.Y_AXIS);
        _jlbPanelLayout = new BoxLayout(_jlbPanel,BoxLayout.Y_AXIS);
        _txtPanel.setLayout(_txtPanelLayout);
        _jlbPanel.setLayout(_jlbPanelLayout);
        Box jlbBox = Box.createVerticalBox();
        
        //textFields
        _jtfAmount.setPreferredSize(new Dimension(100,25));
        _jtfYears.setPreferredSize(new Dimension(100,25));
        _jtfInterest.setPreferredSize(new Dimension(100,25));
        _jtfValue.setPreferredSize(new Dimension(100,25));

        //_txtPanel
        _txtPanel.add(_jtfAmount);
        _txtPanel.add(_jtfYears);
        _txtPanel.add(_jtfInterest);
        _txtPanel.add(_jtfValue);
        this.add(_txtPanel, BorderLayout.EAST);
        
        //JlbPanel
        jlbBox.add(_jlbAmount);
        jlbBox.add(Box.createVerticalStrut(8));
        jlbBox.add(_jlbYears);
        jlbBox.add(Box.createVerticalStrut(9));
        jlbBox.add(_jlbInterest);
        jlbBox.add(Box.createVerticalStrut(9));
        jlbBox.add(_jlbValue);
       
        this.add(jlbBox, BorderLayout.WEST);
        this.add(_jbtCalc,BorderLayout.SOUTH);

        //Actions
        Action exitAction = new AbstractAction("Exit")
        {
            @Override
            public void actionPerformed(ActionEvent actionEvent)
            {
                System.exit(0);
            }
        };
        Action calcAction = new AbstractAction("Calculate")
        {
            @Override
            public void actionPerformed(ActionEvent actionEvent)
            {
                double investmentAmount = Double.parseDouble(_jtfAmount.getText().trim());
                double annualInt = Double.parseDouble(_jlbInterest.getText().trim());
                System.out.print(annualInt);
                int years = Integer.parseInt(_jtfYears.getText().trim());
                double futureVal = investmentAmount * (1 + annualInt)* years*12;
                 _jtfValue.setText(String.valueOf(futureVal));
            }
        };

        //Menu
        this.setJMenuBar(_menuBar);
        _menuBar.add(_opMenu);
        _menuBar.add(_helpMenu);

        _helpMenu.add(new JMenuItem("About"));
         _opMenu.add(exitAction);
        _opMenu.add(calcAction);
        
    }  
  
}
import javax.swing.*;

/**
 * Created by IntelliJ IDEA.
 * User: aortell24
 * Date: 7/15/12
 * Time: 3:52 PM
 * To change this template use File | Settings | File Templates.
 */
public class Application {
    public static void main(String[] args)
    {
        Exercise34_01 frame = new Exercise34_01();
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);

        frame.pack();
    }
}

[pbrockway2]

double annualInt = Double.parseDouble(_jlbInterest.getText().trim());

It sounds like parseDouble() does not like the string you passed it.

You can check with a line of code:

System.out.println("About to parse string=\"" + _jlbInterest.getText().trim() + "\"");
double annualInt = Double.parseDouble(_jlbInterest.getText().trim());

If you do not understand why the string you see is bad, post the output. And if the string is not what you were expecting you will have to figure out why getText() returned the value it did.

[aortell24]

Thank you for the reponse here is the error

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "Annual Interest Rate"
at sun.misc.FloatingDecimal.readJavaFormatString(Floa tingDecimal.java:1242)
at java.lang.Double.parseDouble(Double.java:527)
at Exercise34_01$2.actionPerformed(Exercise34_01.java :82)
at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:2012)
at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2335)
at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:404)
at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton. java:374)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Bas icMenuItemUI.java:829)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mou seReleased(BasicMenuItemUI.java:873)
at java.awt.Component.processMouseEvent(Component.jav a:6268)
About to parse string="Annual Interest Rate"
at javax.swing.JComponent.processMouseEvent(JComponen t.java:3267)
at java.awt.Component.processEvent(Component.java:603 3)
at java.awt.Container.processEvent(Container.java:204 5)
at java.awt.Component.dispatchEventImpl(Component.jav a:4629)
at java.awt.Container.dispatchEventImpl(Container.jav a:2103)
at java.awt.Component.dispatchEvent(Component.java:44 55)
at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4633)
at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4297)
at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4227)
at java.awt.Container.dispatchEventImpl(Container.jav a:2089)
at java.awt.Window.dispatchEventImpl(Window.java:2517 )
at java.awt.Component.dispatchEvent(Component.java:44 55)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.j ava:649)
at java.awt.EventQueue.access$000(EventQueue.java:96)
at java.awt.EventQueue$1.run(EventQueue.java:608)
at java.awt.EventQueue$1.run(EventQueue.java:606)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectio nPrivilege(AccessControlContext.java:105)
at java.security.AccessControlContext$1.doIntersectio nPrivilege(AccessControlContext.java:116)
at java.awt.EventQueue$2.run(EventQueue.java:622)
at java.awt.EventQueue$2.run(EventQueue.java:620)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectio nPrivilege(AccessControlContext.java:105)
at java.awt.EventQueue.dispatchEvent(EventQueue.java: 619)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:138)

[aortell24]

I passed 10000 to the investment amount 2 to the years and 5.75 to the interest Acording to my calculations this should return 11,215.65.I dont understand why the Annual Interest Rate is being mentioned its only the text displayed in that label.

[aortell24]

I figured it out I made a big error I was getting the text from the label instead of the textfield I am so sorry for wasting your time but thank you so much for your help.

double annualInt = Double.parseDouble(_jlbInterest.getText().trim());

should have been

double annualInt = Double.parseDouble(_jtfInterest.getText().trim())

[jfabian]

I'm happy you find the mistake, aortell24. I want you take into considaration don't name reference variable with special character. Maybe the IDE generate that variables name, but in that case try to change the name, this just will help others programmers to quickly understands your code, remenber the Java Nomenclature. Anyways, keep it going! this is just and advice!