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3. AWT – CONTROLS AWT Every user interface considers the following three main aspects: UI elements: These are the core visual elements, the user eventually sees and interacts with. GWT provides a huge list of widely used and common elements varying from basic to complex. We will discuss all these in this tutorial. Layouts: They define how UI elements should be organized on the screen and provide a final look and feel to the GUI (Graphical User Interface). This part will be covered in Layout chapter. Behavior: These are events that occur when the user interacts with UI elements. This part will be covered in Event Handling chapter. Every AWT controls inherit properties from Component class. 5
AWT Sr. No. 1 Control & Description Component A Component is an abstract super class for GUI controls and it represents an object with graphical representation. AWT Component Class The class Component is the abstract base class for the non-menu userinterface controls of AWT. Component represents an object with graphical representation. Class Declaration Following is the declaration for java.awt.Component class: public abstract class Component extends Object implements ImageObserver, MenuContainer, Serializable Field Following are the fields for java.awt.Component class: static float BOTTOM_ALIGNMENT -- Ease-of-use constant for getAlignmentY. static float CENTER_ALIGNMENT -- Ease-of-use constant for getAlignmentY and getAlignmentX. static float LEFT_ALIGNMENT -- Ease-of-use constant for getAlignmentX. static float RIGHT_ALIGNMENT -- Ease-of-use constant for getAlignmentX. static float TOP_ALIGNMENT -- Ease-of-use constant for getAlignmentY(). Class Constructors S.N. Constructor & Description 6
Page 2 and 3: AWT About the Tutorial JAVA provide
Page 4 and 5: AWT AWT TextArea Class ............
Page 6 and 7: AWT AWT MouseAdapter Class ........
Page 8 and 9: 1. AWT - OVERVIEW AWT Graphical Use
Page 10 and 11: 2. AWT - ENVIRONMENT SETUP AWT This
Page 14 and 15: AWT 1 protected Component() This cr
Page 16 and 17: AWT void enable(boolean b) 31 Depre
Page 18 and 19: AWT Returns an array of all the hie
Page 20 and 21: AWT Returns whether the background
Page 22 and 23: AWT Deprecated. As of JDK version 1
Page 24 and 25: AWT 177 178 179 180 181 182 183 184
Page 26 and 27: AWT 218 219 220 221 protected void
Page 28 and 29: AWT Class Constructors S.N. 1 2 3 C
Page 30 and 31: AWT controlPanel = new Panel(); con
Page 32 and 33: AWT Class Declaration Following is
Page 34 and 35: AWT private void prepareGUI(){ main
Page 36 and 37: AWT Output: AWT CheckBox Class Chec
Page 38 and 39: AWT Methods Inherited This class in
Page 40 and 41: AWT }); } statusLabel.setText("Appl
Page 42 and 43: AWT 4 5 Deprecated. As of JDK versi
Page 44 and 45: AWT Checkbox chkApple = new Checkbo
Page 46 and 47: AWT Class Constructors S.N. 1 2 3 C
Page 48 and 49: AWT 38 39 40 41 42 43 44 45 46 47 4
Page 50 and 51: AWT headerLabel.setAlignment(Label.
Page 52 and 53: AWT Output AWT TextField Class The
Page 54 and 55: AWT 21 22 23 24 void setColumns(int
Page 56 and 57: AWT Label namelabel= new Label("Use
Page 58 and 59: AWT static int SCROLLBARS_VERTICAL
Page 60 and 61: AWT public class AwtControlDemo { p
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AWT D:\AWT>javac com\tutorialspoint
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AWT 22 23 Removes the specified ite
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AWT fruitChoice.add("Apple"); fruit
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AWT 2 3 4 5 6 7 void createBufferSt
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AWT headerLabel.setText("Control in
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AWT static int SCALE_SMOOTH -- Ch
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AWT headerLabel.setAlignment(Label.
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AWT AWT Scrollbar Class Scrollbar c
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AWT 29 30 31 Sets the visible amoun
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AWT final Scrollbar horizontalScrol
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AWT extends Window Field Following
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AWT If this Window is visible, send
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AWT }); } } controlPanel.add(showAb
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AWT public class FileDialog extends
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AWT public static void main(String[
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AWT Output 85
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AWT The benefit of this approach is
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AWT Output 91
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AWT Methods Inherited This class in
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AWT static long INVOCAT
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AWT Class Constructors S.N. 1 2 3 C
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AWT Class Methods S.N. 1 2 3 4 5 6
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AWT static int VK_2 static
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AWT static int VK_DECIMAL s
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AWT static int VK_K
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AWT static int VK_SLASH -- Constan
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AWT Class Declaration Following is
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AWT java.util.EventObject java.la
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AWT Class Constructors S.N. 1 2 3 4
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AWT Methods Inherited This interfac
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AWT S.N. 1 Constructor & Descriptio
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AWT Class Methods S.N. 1 2 3 Method
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AWT 8 9 10 11 AdjustmentListener Th
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AWT Interface Declaration Following
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AWT private void showComponentListe
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AWT Interface Declaration Following
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AWT Checkbox chkMango = new Checkbo
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AWT KeyListener Example Create the
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AWT } mainFrame.setVisible(true); c
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AWT Methods Inherited This interfac
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AWT msglabel.addMouseListener(new C
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AWT java.awt.EventListener TextLis
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AWT } controlPanel.add(textField);
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AWT AwtListenerDemo.java package co
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AWT } public void windowClosing(Win
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AWT AdjustmentListener Example Crea
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AWT class CustomAdjustmentListener
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AWT } AwtListenerDemo awtListenerDe
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AWT Output AWT MouseMotionListener
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AWT public void windowClosing(Windo
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AWT Output AWT FocusListener Interf
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AWT }); headerLabel = new Label();
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7. AWT - EVENT ADAPTERS AWT Adapter
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AWT private void prepareGUI(){ main
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AWT Output AWT KeyAdapter Class The
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AWT mainFrame = new Frame("Java AWT
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AWT Output AWT MouseAdapter Class T
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AWT public static void main(String[
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AWT Output AWT MouseMotionAdapter C
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AWT } AwtAdapterDemo awtAdapterDemo
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AWT Output AWT WindowAdapter Class
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AWT private Panel controlPanel; pub
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AWT Output 183
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AWT AWT Layout Manager Interface Th
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AWT component in each region is ide
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AWT java.lang.Object BorderLayout
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AWT panel.add(new Button("Center"),
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AWT mainFrame = new Frame("Java AWT
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AWT } } Compile the program using c
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AWT 8 9 10 11 12 Returns the prefer
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AWT private void showFlowLayoutDemo
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AWT public class GridBagLayout exte
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AWT 17 18 19 20 21 22 23 24 25 26 T
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AWT msglabel.setAlignment(Label.CEN
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AWT Output 213
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AWT 2 3 4 5 6 7 8 9 10 11 12 13 14
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AWT 41 42 43 44 45 46 47 48 49 50 5
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AWT 3 Window A Window object is a t
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AWT Field Following are the fields
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AWT 14 15 16 17 18 19 20 21 22 23 2
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AWT msglabel = new Label(); msglabe
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AWT Class Declaration Following is
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AWT 28 29 30 31 32 33 34 35 36 37 3
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AWT 65 66 67 68 69 70 71 72 void se
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AWT controlPanel.setLayout(new Flow
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10. AWT - MENU CLASSES AWT As we kn
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AWT 7 8 9 10 11 12 13 protected Str
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AWT public class AWTMenuDemo { priv
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AWT copyMenuItem.setActionCommand("
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AWT Output AWT MenuItem Class The M
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AWT 21 22 23 Sets the command name
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AWT Menu editMenu = new Menu("Edit"
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AWT } //add menubar to the frame ma
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AWT 10 11 12 13 14 15 16 17 void in
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AWT private void showMenuDemo(){ //
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AWT editMenu.add(pasteMenuItem); //
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AWT }); //add menu items to menus f
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AWT Class Constructors S.N. 1 2 Con
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AWT } mainFrame.setVisible(true); p
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11. AWT - GRAPHICS CLASSES AWT Grap
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AWT 32 33 34 35 36 37 38 39 40 41 4
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AWT } } @Override public void paint
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AWT Renders the text of the specifi
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AWT public class AWTGraphicsDemo ex
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AWT static int CHORD -- The clos
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AWT Methods Inherited This class in
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AWT AWT CubicCurve2D Class The Cubi
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AWT 25 26 27 28 29 30 31 32 33 34 3
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AWT } }); } @Override public void p
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AWT 4 5 6 PathIterator getPathItera
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AWT Output AWT Rectangle2D Class Th
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AWT 15 16 17 18 19 20 21 22 boolean
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AWT } Compile the program using com
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AWT specified by the control points
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AWT public AWTGraphicsDemo(){ super
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AWT Sets the location of the end po
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AWT Output AWT Font Class The Font
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AWT 3 Font(String name, int style,
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AWT 35 36 37 38 39 40 41 42 43 44 4
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AWT } awtGraphicsDemo.setVisible(tr
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AWT static
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AWT 12 13 14 15 16 17 18 19 20 21 2
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AWT } public void paint(Graphics g)
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AWT 5 BasicStroke(float width, int
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AWT shape1.setFrame(110, 160, 180,8
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