mikemcleanuk
May 2nd, 2009, 08:46 AM
Hey im doing some basic tutorials and ive come across a problem part of my code seems to be shielded from being able to see my lable but i dont know why. It looks like the code inside an if statement make it unable to see the lable but that doesnt make any sense to me.
If you guys could take a look and point out my mistake im sure it will be a rookie error as allways :P
If someone could try explain the problem in simplistic terms so i can try avoid it in the future that would be great also.
The aim of the program is to simply have 2 buttons that will grow and shrink a square box by 10 in each dimention, with the limitation of not going smaller than 10 by 10 or bigger than the window.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.Color;
class GrowBox extends JPanel implements ActionListener
{
private JButton growButton;
private JButton shrinkButton;
JLabel box1;
GrowBox()
{
Dimension mLSize = new Dimension(20,20);
growButton = new JButton("Grow");
shrinkButton = new JButton("Shrink");
this.add(growButton);
this.add(shrinkButton);
growButton.addActionListener(this);
shrinkButton.addActionListener(this);
box1 = new JLabel();
box1.setOpaque(true);
box1.setBackground(Color.green);
box1.setPreferredSize(mLSize);
this.add(box1);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == growButton)
{
int tmpH = box1.getHeight() + 10;
int tmpW = box1.getWidth() + 10;
int frameH = getHeight();
int frameW = getWidth();
if(!(tmpH >= frameH || tmpW >= frameW))
{
box1.setPreferedSize(tmpH, tmpW);
}
}
if(e.getSource() == shrinkButton)
{
int tmpH = box1.getHeight() - 10;
int tmpW = box1.getWidth() - 10;
if(!(tmpH == 0 || tmpW == 0))
{
box1.setPreferedSize(tmpH, tmpW);
}
}
}
}
All help even regarding cleaning up working areas of my code is apprechiated.
C:\JPR\Lab17>javac TestGrowBox.java
.\GrowBox.java:43: cannot find symbol
symbol : method setPreferedSize(int,int)
location: class javax.swing.JLabel
box1.setPreferedSize(tmpH, tmpW);
^
.\GrowBox.java:52: cannot find symbol
symbol : method setPreferedSize(int,int)
location: class javax.swing.JLabel
box1.setPreferedSize(tmpH, tmpW);
^
2 errors
Mike
If you guys could take a look and point out my mistake im sure it will be a rookie error as allways :P
If someone could try explain the problem in simplistic terms so i can try avoid it in the future that would be great also.
The aim of the program is to simply have 2 buttons that will grow and shrink a square box by 10 in each dimention, with the limitation of not going smaller than 10 by 10 or bigger than the window.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.Color;
class GrowBox extends JPanel implements ActionListener
{
private JButton growButton;
private JButton shrinkButton;
JLabel box1;
GrowBox()
{
Dimension mLSize = new Dimension(20,20);
growButton = new JButton("Grow");
shrinkButton = new JButton("Shrink");
this.add(growButton);
this.add(shrinkButton);
growButton.addActionListener(this);
shrinkButton.addActionListener(this);
box1 = new JLabel();
box1.setOpaque(true);
box1.setBackground(Color.green);
box1.setPreferredSize(mLSize);
this.add(box1);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == growButton)
{
int tmpH = box1.getHeight() + 10;
int tmpW = box1.getWidth() + 10;
int frameH = getHeight();
int frameW = getWidth();
if(!(tmpH >= frameH || tmpW >= frameW))
{
box1.setPreferedSize(tmpH, tmpW);
}
}
if(e.getSource() == shrinkButton)
{
int tmpH = box1.getHeight() - 10;
int tmpW = box1.getWidth() - 10;
if(!(tmpH == 0 || tmpW == 0))
{
box1.setPreferedSize(tmpH, tmpW);
}
}
}
}
All help even regarding cleaning up working areas of my code is apprechiated.
C:\JPR\Lab17>javac TestGrowBox.java
.\GrowBox.java:43: cannot find symbol
symbol : method setPreferedSize(int,int)
location: class javax.swing.JLabel
box1.setPreferedSize(tmpH, tmpW);
^
.\GrowBox.java:52: cannot find symbol
symbol : method setPreferedSize(int,int)
location: class javax.swing.JLabel
box1.setPreferedSize(tmpH, tmpW);
^
2 errors
Mike