Download JFC and the Swing Package

JFC and the Swing
Package
Feb 10, 2000
Java Foundation Class (JFC)
AWT (Abstract Window Toolkit) has been used
since jdk1.0
Archaic and very poorly designed
Swing is a part of JFC, which is a huge library
set containing more than 300 classes.
We will use JFC, especially Swing.
Difference between AWT and Swing can be
explained with lightweight and heavyweight
component.
Overview of JComponent
 Control or Widget denotes the group of all the GUI
things that users can press, scroll, type into and
etc.
In Java, we use the term component instead of
control.
Especially in Swing, the term JComponent is used.
Each component in Swing set is a subclass of
javax.Swing.Jcomponent
In Java, it is a component that generate Event!!!
Visual Index of Basic
Swing Component
How to Display Component
Component should be added into container to
be used. (Topic of next lecture)
For today, we use JFrame container without
detailed explanation.
However, we do not put components directly
into JFrame.
Instead we put components into intermediate
container. (Topic of next lecture)
For today, we use one such container in JFrame
import java.awt.*;
import java.awt.event.*
import javax.swing.*;
public class SwingDemo {
JFrame frame;
Container pane;
public static void main(String args[]) {
int w = Integer.parseInt(args[0]);
int h = Integer.parseInt(args[1]);
SwingDemo demo
= new SwingDemo(w,h);
}
} // End of SwingDemo
SwingDemo(int w, int h) {
frame = new JFrame();
frame.setSize(w,h);
pane = frame.getContentPane();
pane.setLayout(new FlowLayout());
frame.setVisible(true);
}
% java SwingDemo 400 300
SwingDemo(int w, int h) {
frame = new JFrame();
frame.setSize(w,h);
pane = frame.getContentPane();
pane.setLayout(new FlowLayout());
JButton b= new JButton(“click me”);
pane.add(b);
frame.setVisible(true);
} ………...
ImageIcon icon = new ImageIcon(“duke.gif”);
JLable label =
new JLabel(“I am Duke”, icon, JLabel.CENTER)
pane.add(label);
frame.setVisible(true);
}
………...
ImageIcon icon = new ImageIcon(“duke.gif”);
JLable label =
new JLabel(“I am Duke”, icon, JLabel.CENTER);
pane.add(label);
JTextField text = new JTextField(10);
text.setBackground(Color.yellow);
pane.add(text);
frame.setVisible(true);
} ………...
ImageIcon icon = new ImageIcon(“duke.gif”);
JLable label =
new JLabel(“I am Duke”, icon, JLabel.CENTER);
label.setToolTipText(“Leave me alone!!!”);
pane.add(label);
………….
frame.setVisible(true);
}
General Structure of
Swing Application
Not used today