Errors in Frame

[Mike Meakin]

Can anyone tell me why I'm getting these 2 errors in line 73:

"Frame2.java": Error #: 300 : class decimalFormat not found in class untitled2.Frame2 at line 73, column 3
"Frame2.java": Error #: 300 : class decimalFormat not found in class untitled2.Frame2 at line 73, column 30


Heres the code:

package untitled2;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;

public class Frame1 extends JFrame {
JPanel contentPane;
XYLayout xYLayout1 = new XYLayout();
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();

/**Construct the frame*/
public Frame1() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
/**Component initialization*/
private void jbInit() throws Exception {
//setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
contentPane = (JPanel) this.getContentPane();
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton1_actionPerformed(e);
}
});
contentPane.setLayout(xYLayout1);
this.setSize(new Dimension(400, 400));
this.setTitle("Frame Title");
jButton2.setText("jButton2");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton2_actionPerformed(e);
}
});
contentPane.add(jButton1, new XYConstraints(93, 87, 205, 115));
contentPane.add(jButton2, new XYConstraints(100, 225, 206, 45));
}
/**Overridden so we can exit when window is closed*/
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
}
}

void jButton1_actionPerformed(ActionEvent e) {
Frame2 frame = new Frame2();
frame.setSize(new Dimension(200, 200));
frame.validate();
frame.setVisible(true);
}

void jButton2_actionPerformed(ActionEvent e) {
Frame3 frame = new Frame3();
frame.setSize(new Dimension(200, 200));
frame.validate();
frame.setVisible(true);
}
}

[Priyaa Vijay]

I see that the total number of lines in the source code is less than 73. Can you exactly tell which line it is? Also, please make sure there is nothing after the end of braces }.

[Priyaa Vijay]

I meant the closing braces of the class

class .... {
.....
.....
}

//NOTHING IS IN HERE

[miguel lisboa]

but this is Frame1
probably you posted the wrong class

[Ernest Friedman-Hill]

It doesn't matter how many lines there are or what the code is -- look at the error message. It says there's no class "decimalFormat". That's probably true. Every single class in the Java APIs uses the standard naming convention that class names start with a capital letter. You're probably trying to use java.text.DecimalFormat. Make sure you've imported it, and capitalize the name.

[Mike Meakin]

SORRY! Stupid me posted the wrong Frame!
Heres the Errors:

"Frame2.java": Error #: 300 : class decimalFormat not found in class untitled2.Frame2 at line 73, column 3
"Frame2.java": Error #: 300 : class decimalFormat not found in class untitled2.Frame2 at line 73, column 30

Heres the code:

package untitled2;
 
import java.awt.*;
import com.borland.jbcl.layout.*;
import javax.swing.*;
import java.awt.event.*;
 
/**
 * Title:
 * Description:
 * Copyright:    Copyright (c) 2005
 * Company:
 * @author
 * @version 1.0
 */
 
public class Frame2 extends JFrame {
  XYLayout xYLayout1 = new XYLayout();
  JTextArea jTextArea1 = new JTextArea();
  JTextField jTextField1 = new JTextField();
  JButton jButton1 = new JButton();
  JTextArea jTextArea2 = new JTextArea();
  JLabel jLabel1 = new JLabel();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
 
  public Frame2() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  private void jbInit() throws Exception {
    jTextArea1.setBackground(SystemColor.control);
    jTextArea1.setBorder(BorderFactory.createEtchedBorder());
    jTextArea1.setText("Enter Earth Weight (lbs):");
    this.getContentPane().setLayout(xYLayout1);
    jButton1.setText("Calculate");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
 
    jTextArea2.setBackground(SystemColor.control);
    jTextArea2.setBorder(BorderFactory.createEtchedBorder());
    jTextArea2.setText("Your Moon Weight Is:");
    jLabel1.setBorder(BorderFactory.createEtchedBorder());
    jButton2.setText("jButton2");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton2_actionPerformed(e);
      }
    });
    jButton3.setText("jButton3");
    jButton3.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton3_actionPerformed(e);
      }
    });
    this.getContentPane().add(jTextArea1,       new XYConstraints(11, 28, 186, 35));
    this.getContentPane().add(jTextField1,  new XYConstraints(220, 28, 170, 38));
    this.getContentPane().add(jButton1,  new XYConstraints(121, 100, 175, 53));
    this.getContentPane().add(jTextArea2,   new XYConstraints(14, 175, 185, 38));
    this.getContentPane().add(jLabel1,   new XYConstraints(217, 173, 170, 40));
    this.getContentPane().add(jButton2,  new XYConstraints(41, 233, 121, 41));
    this.getContentPane().add(jButton3,     new XYConstraints(213, 238, 173, 39));
    }
 
  void jButton1_actionPerformed(ActionEvent e) {
  decimalFormat outFom = new decimalFormat("#.00");
  double out = Double .parseDouble(jTextField1.getText() );
  out = out * 0.166;
  jLabel1 .setText("" + outFom.format (out));
  }
 
  void jButton2_actionPerformed(ActionEvent e) {
  jLabel1 .setText ("");
  jTextField1 .setText ("");
 
  }
 
  void jButton3_actionPerformed(ActionEvent e) {
  System.exit(0);
 
  }
 
 
}

[ March 18, 2005: Message edited by: Joel McNary ]

[miguel lisboa]

you should pay more atention to Ernest Friedman-Hill's post

[Mike Meakin]

Thanks, so how do import java.text.DecimalFormat into the frame ?

[Ernest Friedman-Hill]

Your code starts out:

package untitled2;
 
import java.awt.*;
import com.borland.jbcl.layout.*;
import javax.swing.*;
import java.awt.event.*;

The number one rule of programming: always know what you're doing. Copying stuff that you don't understand, that seems to work, has been called "Cargo Cult Programming." It's always a bad idea, because if you don't understand something, then you never really know if it works correctly or not.

So what you need to do is find out what these statements mean. Presumably you've got an introductory Java book, yes? Look up "import" in the index.

[Layne Lund]

I'm surprised that EFH hasn't suggested that you use UBB tags when you post your code. It will preserve your indentation so that we can more easily read your code. So for future reference, please use them

Layne
[ March 17, 2005: Message edited by: Layne Lund ]

[Mike Meakin]

Its OK I've managed to get it working now thanks, all I've done is import.java.text.DecimalFormatat the top of the page. Thanks for help all!

[Joel McNary]

Originally posted by Layne Lund:
I'm surprised that EFH hasn't suggested that you use UBB tags when you post your code. It will preserve your indentation so that we can more easily read your code. So for future reference, please use them

Layne

[ March 17, 2005: Message edited by: Layne Lund ]

Ernest may not have mentioned it, but I did somethign about it. Surrounding your code with [CODE] and [/CODE] tags prints in in a monopsaced font with preserved indentation. And if you say [CODE] and [/CODE] in your post, you can say [CODE] and [/CODE] without its being interpreted as tags...