CCITcoder
Contents
Introduction to Java
DataType and Operation
Conditional statements
Iterative statements
Functions
OOPs
- OOPs
- Object
- Access Specifiers
- Methods Returning Value
- Nesting of methods
- method Overloading
- Constructor
- Constructor Overloading
- Immutablemmutable Objects
String
Static Data members
Inherintance
- Inherintance
- Method Overriding
- calling base method
- Constructors and Inheritance
- Types of Inheritance
- Single Inhertance
- Multi-level Inheritance
- Hierarchical Inheritance
Polymorphisam
Applets
AWT
- AWT
- Class Frame
- Class Button
- Event Delegation Modal
- Class TextField
- Class TextArea
- Class Label
- Class Component
- Class Container
- Class Checkbox
- Class List
- Class Choice
- Class FlowLayout
- Class BorderLayout
- Class GridLayout
- Class CardLayout
- Class Panel
- Class Font
- Menus
- Mouse Events
- Window Events
MultiThreading
I/o
Exception Handling
Collection FrameWork
Contents
Introduction to Java
DataType and Operation
Conditional statements
Iterative statements
Functions
OOPs
- OOPs
- Object
- Access Specifiers
- Methods Returning Value
- Nesting of methods
- method Overloading
- Constructor
- Constructor Overloading
- Immutablemmutable Objects
String
Static Data members
Inherintance
- Inherintance
- Method Overriding
- calling base method
- Constructors and Inheritance
- Types of Inheritance
- Single Inhertance
- Multi-level Inheritance
- Hierarchical Inheritance
Polymorphisam
Applets
AWT
- AWT
- Class Frame
- Class Button
- Event Delegation Modal
- Class TextField
- Class TextArea
- Class Label
- Class Component
- Class Container
- Class Checkbox
- Class List
- Class Choice
- Class FlowLayout
- Class BorderLayout
- Class GridLayout
- Class CardLayout
- Class Panel
- Class Font
- Menus
- Mouse Events
- Window Events
MultiThreading
I/o
Exception Handling
Collection FrameWork
AWT-Abstract Window Toolkit
Class Button [ java.awt ]
- It is used to create a Button component.
- A button is used to perform some action when it is clicked.
- Button()
- Will create a button without label
- For ex:b=new Button();
- Button(String lbl)
- Will create a button with specified label.
- For ex:b=new Button("OK");
- void setLabel(String label)
- Sets the button's label to be the specified string.
- For ex:b.setLabel("Stop");
- String getLabel()
- Gets the label of this button.
- For ex:String str=b.getLabel();
- void addActionListener(ActionListener l)
- It registers an action Listener for button due to which the listener will be notified when button events occurs.
- For ex: b.addActionListener(x);
#Write a program to create a window of size 400 X 300.Design a frame containing an OK button.
import java.awt.*;
class MyFrame extends Frame
{
public MyFrame()
{
setLayout(new FlowLayout());
Button btn;
btn=new Button("OK");
add(btn);
}
}
class demo
{
public static void main(String args[])
{
MyFrame frm=new MyFrame();
frm.setSize(200,200);
frm.setVisible(true);
}
}
- Components can be defined as data members or in init method.
- It depends on our requirement.
- If a component is required in other methods of class then they must be defined as data members.
- If components are not required in other methods of class then they can be defined in init method.
#Write a program to create a window of size 400 X 300.
import java.awt.*;
class MyFrame extends Frame
{
Button b1,b2;
public MyFrame()
{
setLayout(new FlowLayout());
b1=new Button("RED");
b2=new Button("BLUE");
add(b1);
add(b2);
}
}
class demo
{
public static void main(String args[])
{
MyFrame frm=new MyFrame();
frm.setSize(400,300);
frm.setVisible(true);
}
}
#Design a frame with 7 Buttons. I.e. Sunday, Monday,... Saturday.
import java.awt.*;
class MyFrame extends Frame
{
public MyFrame()
{
setLayout(new FlowLayout());
Stringarr[]={"Monday","Tuesday","Wednesday","Thursday","Friday",
"Saturday","Sunday"};
for(int i=0;i<arr.length;i++)
{
Button btn=new Button(arr[i]);add(btn);
}
}
}
class demo
{
public static void main(String args[])
{
MyFrame frm=new MyFrame();
frm.setSize(400,400);
frm.setVisible(true);
}
}
