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Panels
Panels are rectangular components, which serve two main purpose:
1. they can be used as canvas that one draws on
2. they can be used as containers to embed further graphical components

The definition of the handler class:

[public] class class-name [extends superclass-name] implements ActionListener {
  ….
  public void actionPerformed(ActionEvent ae) {
     ….
  }
}

public JLabel(String text)

public JLabel(ImageIcon picture)

public String getText()

public void setText(String text)

public void setText(String text, int alignment)

public void setForeground(Color c)

public void setBackground(Color c)

public void setOpaque(boolean b)

-

getText() returns the text currently displayed in the label as a String.

setText(String text, int alignment) alignment=SwingConstants.CENTER, LEFT, RIGHT

setOpaque(boolean b) Set non-transparent, transparent

JFrame()

setVisible(boolean b)

setTitle(String title)

setSize(int width, int height)

setLocation(int horizontal, int vertical)

pack()

setDefaultCloseOperation(int operation)

pack() resizes the frame so that it tightly fits around components embedded into its content pane.

1. Creating a top-level container object

2. Creating GUI components and adding them to the top-level container

3. Adding the functionalities to the GUI components

Swing - Java Foundation Classes http://java.sun.com/javase/6/docs/technotes/guides/swing/

Java Swing http://www.javaswing.net/

A Swing Architecture Overview http://java.sun.com/products/jfc/tsc/articles/architecture/

Drag and Drop http://java.sun.com/javase/6/docs/technotes/guides/dragndrop/

Java 3D https://java3d.dev.java.net/

J3D.org http://java3d.j3d.org/