This document discusses various Java Swing GUI components that can be used to build graphical user interfaces (GUIs) in Java, including JFrame, JScrollPane, and JLabel. It provides information on how to use these components, such as how to set properties of JFrames like the title, size, and location. It also covers JScrollPane policies for controlling scroll bars, and properties of JLabels like text, icons, and alignment. The document instructs students to build the interface of a game project using these Swing components, including screens for splash, signup, sign in, main, levels, and help.

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
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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
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4. State constants
• NORMAL • ICONIFIED • MAXIMIZED_BOTH • MAXIMIZED_HORIZ
• MAXIMIZED_VERT
GUI Components  JFrame
Instructor: Tanzila Kehkashan
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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
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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
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7. Instructor: Tanzila Kehkashan
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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
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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
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10. Instructor: Tanzila Kehkashan
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11. • Create your project’s interface:
• Splash screen
• Signup
• Sign in
• Main screen
• Levels
• Help
• Create package of your project
ASSIGNMENT
Instructor: Tanzila Kehkashan
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12. Instructor: Tanzila Kehkashan
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