calulator

import java.awt.GridLayout; import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.Container; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JButton; import javax.swing.JTextField;

public class Calculator extends JFrame implements ActionListener { private JButton[] buttons, button2; private Container container; private JPanel buttonJPanel, textPane; private GridLayout gridLayout1, gridLayout2; private String[] numbers = {"7","8","9","/","4","5","6","*","1","2","3","-","0",".","+","="}; private JTextField textField; public Calculator(){

    super(" Calculator ");
   textField = new JTextField(20);
   
   textField.setEditable(true);
 
   buttons = new JButton[numbers.length];
   buttonJPanel = new JPanel();
   buttonJPanel.setLayout(new GridLayout(4,4,5,10));
  
   
    for(int count = 0; count < numbers.length; count++)
    {
    buttons[ count ] = new JButton( numbers[ count ] );// initilizing array 
    buttons[ count ].addActionListener(this);
     buttonJPanel.add(buttons[ count ]);// collects the buttons and put them in a layout of (4,4)
    }// end for
    
    container = getContentPane();
    container.add(textField , BorderLayout.NORTH);
    container.add(buttonJPanel, BorderLayout.CENTER);

  
    
}// end contructor


@Override
public void actionPerformed(ActionEvent event)
{

for(JButton button : buttons )
{

     if( event.getSource() == button )
         textField.setText( buttons.toString());
     
}
}// end actionPerormed 

}// end of class calculator