Calculator written in Java, code shows!

Calculator written in Java, code shows!
java.awt.BorderLayout The Import;
Import java.awt.Dimension;
Import java.awt.GridLayout;
Import java.awt.event.ActionEvent The;
Import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.UIManager;

public class ButtonArrayExample extends JFrame {// form class inherits the JFrame
/ **

• */
  private static final long serialVersionUID = 6626440733001287873L;
  private JTextField textField;

  static void main public (String args []) {
  the try {
  the UIManager.setLookAndFeel ( "");
  } the catch (the Throwable E) {
  e.printStackTrace ();
  }
  ButtonArrayExample new new ButtonArrayExample Frame = ();
  frame.setVisible (to true); // set form visible, default is not visible
  }

  ButtonArrayExample public () {
  Super (); // inherited parent class constructor of
  the BorderLayout borderLayout = (the BorderLayout) the getContentPane () getLayout ();.
  borderLayout.setHgap (20 is);
  borderLayout.setVgap (10);
  setTitle ( "Calculator "); // set the title of the form
  setBounds (100, 100, 290, 282); // set the form and size of the display position
  setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); // Close button operation form is set to exit
  textField the JTextField new new = ();
  textField.setHorizontalAlignment (SwingConstants.TRAILING);
  textfield.setPreferredSize (new new the Dimension (12 is, 50));
  the getContentPane () the Add (the textField, BorderLayout.NORTH);.
  textField.setColumns (10);
  Final GridLayout gridLayout = new GridLayout (4, 0 ); // Create a grid layout manager object
  gridLayout.setHgap (5); // set the horizontal spacing component
  gridLayout.setVgap (5); // set vertical gap assembly
  JPanel panel = new JPanel (); // get the container object
  panel.setLayout (gridLayout); // set container using a grid layout manager
  getContentPane () add (. Panel, BorderLayout.CENTER);
  String [] [] = {{names ". 1", "2", ". 3", "+"}, { ". 4", ". 5", ". 6", "-"} , { ". 7", ". 8", ". 9", "×"}, { ".", "0", "=", "÷"}};
  the JButton [] [] Buttons = new new the JButton [. 4] [. 4];
  for (int Row = 0; Row <of names.length; Row ++) {
  for (int COL = 0; COL <of names.length; COL ++) {
  Buttons [Row] [COL] = new new the JButton (names [Row ] [col]); // Create button object
  buttons [row] [col] .addActionListener (new ActionListener () {

              @Override
              public void actionPerformed(ActionEvent e) {
                  JButton button = (JButton) e.getSource();
                  String text = textField.getText();
                  textField.setText(text + button.getText());
              }
          });
          panel.add(buttons[row][col]); // 将按钮添加到面板中
      }
  }

  }

}
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