Untitled

import javax.swing.JButton;                           	/*   import library GUI   */
import javax.swing.JFrame;				/*   import library GUI   */
import javax.swing.JTextField;				/*   import library GUI   */
import java.awt.EventQueue;				/*   import library GUI   */

public class Frame1 extends JFrame {			/*   call Class   */

	private JButton btn[] = new JButton[16];							  /*   Create Button Array   */
	private String[] alist = {"7","8","9","x","4","5","6","/","1","2","3","-",".","0","00","+"};      /*   Create Symbols or Name of Button   */
	
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				Frame1 frame = new Frame1();     				/*   Create JFrame   */
				frame.setVisible(true);					/*   Show GUI   */
			}
		});
	}

	public Frame1() {
		int count = 0;								/*   Set Variable Count   */
		
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);			
		setBounds(0, 0, 360, 550);
		setTitle("Calculator");
		getContentPane().setLayout(null);
		
		final JTextField txt = new JTextField();				/*   Create TextField   */
		txt.setBounds(30, 30, 290,50);						/*   Set (x,y) TextField   */
		getContentPane().add(txt);						/*   Show TextField   */
		txt.setColumns(10);
		
		JButton btn17 = new JButton("CE");					/*   Create button   */
		btn17.setBounds(110, 430, 50, 50);					/*   Set (x,y) button   */
		getContentPane().add(btn17);						/*   Show button   */
		
		JButton btn18 = new JButton("C");					/*   Create button   */
		btn18.setBounds(30, 430, 50, 50);					/*   Set (x,y) button   */
		getContentPane().add(btn18);						/*   Show button   */
		
		JButton btn19 = new JButton("=");					/*   Create button   */
		btn19.setBounds(190, 430, 130, 50);					/*   Set (x,y) button  */
		getContentPane().add(btn19);						/*   Show button   */
		
		
		/*   Use For Loop for Create 16 Button   */
		for (int y = 110; y < 360; y += 80 ) {					/*   Set X   */
			for (int x = 30 ; x < 280 ; x += 80 ) {				/*   Set Y   */
		
				btn[count] = new JButton(alist[count]);			/*   Create button array form    */
				btn[count].setBounds(x, y, 50, 50);			/*   set (x,y) of button array form    */
				getContentPane().add(btn[count]);			/*   show button on the screen     */
				count += 1 ;						/*   Create button array form     */
				
			
			}
		}
		
	}
}