Object-Oriend Programming using Java

1. CS3135/CS2135
Object Oriented Programming (Java)
BSCS-3 / MCS-3
Lecture # 6
JFrame,
JScrollPane
JLabel

2. GUI Components  JFrame
javax.swing.JFrame
• JFrame()
• JFrame(String)
• void super()
• void super(String)
• void setLayout()
• void setTitle(String)
• String getTitle()
• void setLocation(int, int) // x, y
• void setSize(int, int) // width, height
• void setBounds(int, int, int, int) // x, y, width, height
• void setVisible(boolean)
• void getContentPane().setBackground(Color)
• void setUndecorated(boolean)
Instructor: Tanzila Kehkashan
2

3. • setIconImage(ImageIcon.getImage())
• setExtendedState(int) //state constant
• setCursor(Cursor)
• add(component)
• void setJMenuBar(JMenuBar)
• void setDefaultCloseOperation(int)
• int getDefaultCloseOperation()
Default Close Constants
• DO_NOTHING_ON_CLOSE
• HIDE_ON_CLOSE //Default for JDialog and JFrame
• DISPOSE_ON_CLOSE //removes window from screen and frees up any resources used by it
• EXIT_ON_CLOSE //Exits the application, using System.exit(0)
GUI Components  JFrame
Instructor: Tanzila Kehkashan
3

4. State constants
• NORMAL • ICONIFIED • MAXIMIZED_BOTH • MAXIMIZED_HORIZ
• MAXIMIZED_VERT
GUI Components  JFrame
Instructor: Tanzila Kehkashan
4

5. GUI Components  JFrame  Cursor
java.awt.Cursor
• Cursor(int) // Cursor constant
• Cursor getDefaultCursor()
• Cursor getPredefinedCursor(int) //cursor constant
Cursor Constant
• CROSSHAIR_CURSOR • DEFAULT_CURSOR • E_RESIZE_CURSOR
• HAND_CURSOR • MOVE_CURSOR • N_RESIZE_CURSOR
• NE_RESIZE_CURSOR • NW_RESIZE_CURSOR • S_RESIZE_CURSOR
• SE_RESIZE_CURSOR • SW_RESIZE_CURSOR • TEXT_CURSOR
• W_RESIZE_CURSOR • WAIT_CURSOR
Instructor: Tanzila Kehkashan
5

6. javax.swing.JScrollPane
• JScrollPane()
• JScrollPane(Component)
• void setHorizontalScrollBarPolicy(int) // method determines when horizontal scroll bar appears
• void setVerticalScrollBarPolicy(int) // method determines when vertical scroll bar appears
• void setHorizontalScrollBar(JScrollBar)
• void setVerticalScrollBar(JScrollBar)
Policies Constants
• HORIZONTAL_SCROLLBAR_ALWAYS
• HORIZONTAL_SCROLLBAR_AS_NEEDED //default
• HORIZONTAL_SCROLLBAR_NEVER
• VERTICAL_SCROLLBAR_ALWAYS
• VERTICAL_SCROLLBAR_AS_NEEDED //default
• VERTICAL_SCROLLBAR_NEVER
GUI Components  JFrame  JScrollPane
Instructor: Tanzila Kehkashan
6

7. Instructor: Tanzila Kehkashan
7

8. javax.swing.JLabel
• JLabel(ImageIcon)
• JLabel(ImageIcon, int)
• int specifies horizontal alignment of label’s contents
• LEFT, CENTER, RIGHT, LEADING, TRAILING.
• JLabel(String)
• JLabel(String, ImageIcon, int)
• JLabel(String, int)
• JLabel()
• void setText(String)
• String getText()
• void setIcon(ImageIcon)
• Icon getIcon()
• setToolTipText(String)
GUI Components  JFrame  JLabel
Instructor: Tanzila Kehkashan
8

9. • void setVisible(boolean)
• void setVerticalTextPosition(int)
• int getVerticalTextPosition()
• void setHorizontalTextPosition(int)
• int getHorizontalTextPosition()
Horizontal position constants
• LEFT
• CENTER
• RIGHT
Vertical position constants
• TOP
• CENTER
• BOTTOM
GUI Components  JFrame  JLabel
Instructor: Tanzila Kehkashan
9

10. Instructor: Tanzila Kehkashan
10

11. • Create your project’s interface:
• Splash screen
• Signup
• Sign in
• Main screen
• Levels
• Help
• Create package of your project
ASSIGNMENT
Instructor: Tanzila Kehkashan
11

12. Instructor: Tanzila Kehkashan
12