سلام
مثال صفحه 395 آقای جعفر نژاد قمی را عینا با نت بینز اجرا کرده و ارور می دهد . اشکال از کجاست ؟
//پنجره و استفاده از Jbutton و Jlabel
package test113;
import javax.swing.JFrame;
public class Test113 {
private static final int WIDTH=350;
private static final int HEIGHT=350;
public static void main (String[] args){
LabelsColorsFonts demoObject=new LabelsColorsFonts();
demoObject.setSize(WIDTH , HEIGHT);
demoObject.setVisible(true);
demoObject.setDefaultCloseOperation(JFrame.EXIT_ON _CLOSE);
}
}
//فایل جدیدLabelsColorsFonts
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class LabelsColorsFonts extends JFrame{
private JLabel javaL , programmingL ;
private JButton colorB , fontB ;
private ColorButtonHandler cHandler ;
private FontButtonHandler fHandler ;
private Container pane ;
public LabelsColorsFonts(){
//Create two labels
javaL=new JLabel("Java",SwingConstants.CENTER);
programmingL=new JLabel("Programming",SwingConstants.CENTER);
//Create color button
colorB=new JButton("Color");
cHandler=new ColorButtonHandler();
colorB.addActionListener(cHandler);
//Create font button
fontB=new JButton("Font");
fHandler=new FontButtonHandler();
fontB.addActionListener(fHandler);
//Set the title of the window
setTitle("Labels , fonts , and colors demonstration");
//Get the container
pane=getContentPane();
//Set the layout
pane.setLayout(new GridLayout(2,2));
//Place the components in the pane
pane.add(javaL);
pane.add(programmingL);
pane.add(colorB);
pane.add(fontB);
}
//************************************************** *
private class ColorButtonHandler implements ActionListener{
@Override
public void actionPerformed(ActionEvent e){
javaL.setForeground(Color.red);
programmingL.setForeground(Color.blue);
pane.setBackground(Color.cyan);
colorB.setBackground(Color.orange);
fontB.setBackground(Color.orange);
}
}//end of class class ColorButtonHandler
//************************************************** *******
private class FontButtonHandler implements ActionListener{
@Override
public void actionPerformed(ActionEvent e){
javaL.setFont(new Font("Arial",Font.BOLD,24));
programmingL.setFont(new Font("Arial",Font.BOLD,24));
}
}//End of class FontHandler
}//End of class LabelsColorsFonts
پاسخ با نقل قول
نوشته شده توسط vahid-p
