DCIT 23 - FINALS

• JFrame can be created in 2 ways:

  1. by creating an object of the Frame class. That is, creation through association
  2. by extending the Frame class. That is, OOP creation through class inheritance
• .setTitle(" "); - sets title of frame
• .setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  • exits out of application
• .setResizable(false);

  • prevent frame from being resized
• .setSize(420, 420);

  • sets the dimensions of the frame
• .setVisible(true);

  • make frame visible
• .setIconImage();

  • change icon of the frame
  • the argument inside of this will come from an image that is instantiated from ImageIcon.
• .getContenPane().setBackground(Color.red);

  • change color of background
  • can be modified with RGB value / Hexadecimal value
• .add()

  • method of the JFrame to add new components
• .setText(" ");

  • sets text of label
• .setIcon();

  • sets icon of label
  • the argument inside of this must be an icon like ImageIcon.
• .setBounds(int x, int y, int a, int b);

  • sets position & dimensions of the label
  • x & y for the position and a & b for the dimension
• .setHorizontalTextPosition(JLabel.CENTER)

  • if you want your label at the center
• .setVerticalTextPosition(JLabel.TOP)

  • if you want your label at the top
• .setForeground(Color.gray);

  • changes the font color
• .setFont(newFont());

  • customize your font with setFont method
• .setIconTextGap();

  • sets gap between text label and icon label
• .setVerticalAlignment(Jlabel.Center);

  .setHorizontalAlignment(Jlabel.Center);

  • centers the label's content vertically & horizontally within the label's bounds
• JLabel - a component which displays a readable text or an image in the Swing Container User Interface.
• JPanel - is a simplest container class. It provides space in which an application can attach other component. It inherits the Jcomponents class.
• .setBackground(int x, int, y, int a, int b);

  • sets the background of the panel
• .addActionListener(action);

  • adds action to the button
• .setFocusable(false);

  • removes focus to the button
• BorderLayout - arranges the components to fit in the five regions:

  • east
  • west
  • north
  • south
  • center
• FlowLayout - arranges the components in a line, one after another. If the horizontal space in the container is too small, it will use the next available row.
• GridLayout - arranges the components a rectangular grid. One component is displayed in each rectangle.
• JOptionPane - is used to provide standard dialog boxes. These dialog boxes are used to display information or get input from the user
• JTextField - is a text component that allows the editing of a single line text.
• JCheckBox - is a text component that turn an option on (true) or off (false)
• JRadioButton - is used to choose one option from multiple options
• JComboBox - shows a popup menu that shows a list and the user can select an option from that specified list
• BorderLayout

  • .setLayout(newBorderLayout());
  • .add(label,BorderLayout.North);
  • center component
  • south and north
  • west and east
  • .setLayout(newBorderLayout(5, 10);
• .setLayout(newBorderLayout());

  • to set the BorderLayout to the container
• .add(label,BorderLayout.North);

  • to layout a component with border layout (NORTH, EAST, WEST, SOUTH, CENTER).
• center component

  • will resize proportionally to the size of the frame
• south and north

  • component will only expand horizontally
• west and east - component will only expand vertically
• .setLayout(newBorderLayout(5,10);

  • to set up margin for the BorderLayout of each components
• Flow Layout

  • .setLayout(new FlowLayout());
  • .setLayout(new FlowLayout(FlowLayout.CENTER));
  • .add(label);
  • .setLayout(new FlowLayout(FlowLayout.CENTER,5,10));
• .setLayout.(newFlowLayout())'

  • to set the FlowLayout to the container