Notes on core java

1. Core Java
1
Debasish Pratihari
Setting Fonts
Example :
import java.awt.*;
class FontDemo extends Frame{
Label label;
Font font;
FontDemo(){
super("FontDemo By Debasish Pratihari");
label= new Label("Welcome to Lakshya");
setLayout(new FlowLayout());
// Font Setting for Output-2
font=new Font("Arial",Font.BOLD,20);
// Font Setting for Output-3
//font=new Font("Arial",Font.BOLD+Font.ITALIC,30);
label.setFont(font);
add(label);
pack();
setVisible(true);
}
public static void main(String args[]){
new FontDemo();
}
}
Output 1:
Output 2:
Output 3:
Lecture/core/awt5/17
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2. Core Java
Debasish Pratihari
Setting Cursors for Components
Example
import java.awt.*;
class CursorDemo extends Frame{
Button button;
Cursor cursor;
CursorDemo(){
super("FontDemo By Debasish Pratihari");
button= new Button("Click Me");
setLayout(new FlowLayout());
cursor= new Cursor(Cursor.HAND_CURSOR);
button.setCursor(cursor);
add(button);
pack();
setVisible(true);
}
public static void main(String args[]){
new CursorDemo();
}
}
ToolKit Object :
 This object represents the environment on your
computer so it encapsulate all the properties
and capabilities of that environment , including
screen size and resolution.

To Obtain toolkit object:
o
o
ToolKit toolkit =
ToolKit.getDefaultToolKit();
Frame f= new Frame();
ToolKit toolkit=f.getToolKit();
Lecture/core/awt5/17
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3. Core Java
Debasish Pratihari
GraphicsEnvironment:

This object contains information about
graphics device attached to the system.

the
To Obtain GraphicsEnvironment Object :
GraphicsEnvironment graphics=
GraphicsEnvironment.getLocalGraphicsEnvironment();
Steps to create Menu :
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create a Menu Bar
create required Menus
create Menu Items for all the menus
make the Menu items event sensitive
provide the event handlers for Menu items
add the menu items into the corresponding
Menus.
add menus to the menu bar
or incase of sub-menu add the menu to the
corresponding main-menu.
add the menu bar to the container
Example of Menu:
Lecture/core/awt5/17
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4. Core Java
Debasish Pratihari
Code Example :
import java.awt.*;
import java.awt.event.*;
public class MenuDemo extends Frame{
Label label;
MenuBar mb;
Menu col,ft,fname,style;
MenuItem red,green,blue,font1,font2,font3;
MenuShortcut ms;
Font font;
CheckboxMenuItem style1,style2,style3;
public MenuDemo(){
label=new Label("Welcome to Lakshya");
mb = new MenuBar();
col = new Menu("Color");
add(label);
ms=new MenuShortcut(KeyEvent.VK_R);
red=new MenuItem("Red",ms);
green=new MenuItem("Green",new
MenuShortcut(KeyEvent.VK_R,true));
blue=new MenuItem("Blue");
col.add(red);
col.add(green);
col.add(blue);
ft = new Menu("Font");
fname= new Menu("Name");
font1=new MenuItem("Arial");
font2=new MenuItem("Verdana");
font3=new MenuItem("Garamond");
style= new Menu("Style");
style1= new CheckboxMenuItem("Bold");
style2= new CheckboxMenuItem("Italic");
style3= new CheckboxMenuItem("Underline");
fname.add(font1);
fname.add(font2);
fname.add(font3);
style.add(style1);
style.add(style2);
style.add(style3);
ft.add(fname);
ft.add(style);
mb.add(col);
mb.add(ft);
add(back);
setMenuBar(mb);
setTitle("MenuDemo By Debasish Pratihari");
setSize(300,200);
setVisible(true);
}
public static void main(String args[]){
new MenuDemo();
}
}
Lecture/core/awt5/17
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