JButton Properties (Java)

The following code demonstrates the most common properties that we used on button, like setting size , displaying button name, clicking on it , pressing key etc..

Code

Displaying JButton Name: 

       // "Show" is a text displays on button

            JButton btnDisplay = new JButton("Show");

Setting JButton Size:

       // Setting Size Of Button Explicitly

            btnDisplay.setPreferredSize(new Dimension(100,50));

Clicking On JButton:

      // If user click on button then display some message

      // Using anonymous inner class

            btnDisplay.addActionListener(new ActionListener() {

                          

                  public void actionPerformed(ActionEvent ae) {

                          

                      JOptionPane.showMessageDialog(null, "Pressed Show Button");

                  }

           });

Pressing Key On JButton:

      // If user pressed key on button suppose it press "Enter Key"

           btnDisplay.addKeyListener(new KeyAdapter() {

                      

                  public void keyPressed(KeyEvent ke) {

                                 

                        if (ke.getKeyCode() == KeyEvent.VK_ENTER) {

              

                            JOptionPane.showMessageDialog(null, "Hello World!!!");

                       }

                  }

           });

Changing JButton Font:

      // Changing Font Style, Making It bold and specifying font size

          btnDisplay.setFont(new Font("Comic Sans", Font.BOLD, 13));

Changing JButton Background Color:

     // Changing Button Background color

          btnDisplay.setBackground(Color.cyan);