Button Class

A button is a component that has a label and can respond when pressed.

Button()              - Construct a button with no label

Button(String label)        - Construct a button with specified label

Methods

setLabel(String label) – It sets the label to the specified string

getLabel()          - Gets the label from the button.

Example:

 import java.awt.*;

class frameDemo

{

public static void main(String[] args)

        {

            Button b;

            Frame f=new Frame(“Button Demo”);

            f.setSize(250,150);

            b=new Button(“Click me”);

            f.add(b);

            f.setLocation(200,200);

            f.setVisible(true);

            System.out.println(“Return to DOS prompt and press ctrl+C to quit”);

        }

}

output:

The setLocation(int x, int y) –   This method displays frame located upper left corner at x,y.

The add() method adds the button to the frame.

Note: Button fills the entire Frame. Because, A frame’s default Layout manager is always Border Layout and its default constraint is BorderLayout.CENTER.