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java-swing.md

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Java Swing

GUI Basics

  • Lecture Notes

  • Swing Notes

  • Swing (interface) vs. AWT (event handling)

  • import javax.swing.*;

public class MyFrame {
	public static void main(String[] args) {
		JFrame frame = new JFrame("Test Frame");
		frame.setSize(400, 300);
		frame.setLocationRelativeTo(null);
		frame.setVisible(true);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}
  • import javax.swing.*;

public class MyFrameWithComponents { 
	public static void main(String[] args) { 
		JFrame frame = new JFrame( "MyFrameWithComponen")

		JButton jbtOK = new JButton("OK"); // Add a button into the frame 
		frame.add(jbtOK); 

		frame.setSize(400, 300); 
		frame.setDefau1tC10seOperation(JFrame.EXIT_ON_CLOSE); 
		frame.setLocationRe1ativeTo(nu11); // Center the frame 
		frame.setVisib1e(true);
	}
}

  • JFrame with inheritence

Layout Manager

  • For arraning a position into containers

  • FlowLayout

  • GridLayout

  • BorderLayout

  • Color class

    • Color mycolor = new Color(228, 100, 50);
// how to set for button
mybutton.setBackground(Color.mycolor);
mybutton.setForeground(Color.mycolor);

JPanel

Event-Handling in Java (Event-Driven Programming)

  • Lecture Notes

  • Event-driven programming (depends of action) <-> procedural programming (step by step)

  • HandleEvent

  • HandleEvent1 with the use of Inner Classes

  • User Action			Object			Generated

Click a button			JButton			ActionEvent
Click a check box		JCheckBox		ItemEvent, ActionEvent
Click a radio button		JRadioButton		ItemEvent, ActionEvent
Press return on a text field	JTextField		ActionEvent
Select a new item		JComboBox		ItemEvent, ActionEvent
Window opened, closed, etc.	Window			WindowEvent 
Mouse pressed, released, etc.	Component		MouseEvent 
Key released, pressed, etc. 	Component		KeyEvent 

  • Event Class		Listener Interface	Listener Methods (Handlers)
ActionEvent		ActionListener		actionPerformed(ActionEvent)
ItemEvent		ItemListener		itemStateChanged(ItemEvent)
WindowEvent		WindowListener		windowClosing(WindowEvent)
						windowOpened(WindowEvent)
						windowIconified(WindowEvent)
						windowDeiconified(WindowEvent)
						windowClosed(WindowEvent)
						windowActivated(WindowEvent)
						windowDeactivated(WindowEvent)
ContainerEvent		ContainerListener	componentAdded(ContainerEvent)
						componentRemoved(ContainerEvent) 
MouseEvent		MouseListener		mousePressed(MouseEvent)
						mouseReleased(MouseEvent) 
						mouseClicked(MouseEvent)
						mouseExited(MouseEvent)	
						mouseEntered(MouseEvent)
KeyEvent		KeyListener		keyPressed(KeyEvent)
						keyReleased(KeyEvent) 
						keyTypeed(KeyEvent)