package 計算器;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

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

public class Jisuanqi extends JFrame {

public static void main(String[] args) {
Jisuanqi frame = new Jisuanqi();

frame.setTitle("計算器");
frame.setSize(300,400);
frame.setResizable(false);
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.init();
frame.setVisible(true);
}

private void init()
{
textField = new JTextField();
textField.setEditable(false);
textField.setHorizontalAlignment (JTextField.RIGHT);
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(4, 4));

Container container = getContentPane();
container.add(textField, BorderLayout.NORTH);
container.add(panel, BorderLayout.CENTER);

panel.add(useButton(‘7‘));
panel.add(useButton(‘8‘));
panel.add(useButton(‘9‘));
panel.add(useButton(‘+‘));
panel.add(useButton(‘4‘));
panel.add(useButton(‘5‘));
panel.add(useButton(‘6‘));
panel.add(useButton(‘-‘));
panel.add(useButton(‘1‘));
panel.add(useButton(‘2‘));
panel.add(useButton(‘3‘));
panel.add(useButton(‘*‘));
panel.add(useButton(‘0‘));
panel.add(useButton(‘.‘));
panel.add(useButton(‘=‘));
panel.add(useButton(‘/‘));
}

public JButton useButton (final char key)
{
JButton button = new JButton(String.valueOf(key));

button.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
JButton btn = (JButton) event.getSource();
char key2 = btn.getText().charAt(0);

action(key2);
}
});
button.addKeyListener(new KeyAdapter()
{
public void keyReleased(KeyEvent event)
{
char key2 = event.getKeyChar ();
action(key2);
}
});

return button;
}

private void action(char key2)
{
if(reop)
{
textField.setText("");
reop = false;
}

switch(key2)
{
case ‘+‘:
a1 = Double.parseDouble(textField.getText());
textField.setText("");
operator = ‘+‘;
break;
case ‘-‘:
a1 = Double.parseDouble(textField.getText());
textField.setText("");
operator = ‘-‘;
break;
case ‘*‘:
a1= Double.parseDouble(textField.getText());
textField.setText("");
operator = ‘*‘;
break;
case ‘/‘:
a1= Double.parseDouble(textField.getText());
textField.setText("");
operator = ‘/‘;
break;
case ‘=‘:
reop = true;
a2 = Double.parseDouble(textField.getText());
switch(operator)
{
case ‘+‘:
result = a1 + a2;
break;
case ‘-‘:
result= a1 - a2;
break;
case ‘*‘:
result = a1 * a2;
break;
case ‘/‘:
result = a1 / a2;
break;
default: ;
}
textField.setText(String.valueOf(result));
break;
case ‘1‘:
case ‘2‘:
case ‘3‘:
case ‘4‘:
case ‘5‘:
case ‘6‘:
case ‘7‘:
case ‘8‘:
case ‘9‘:
case ‘0‘:
case ‘.‘:
String text = textField.getText() + key2;
textField.setText(text);
break;
default: ;
}
}
private JTextField textField;
private double a1, a2, result;
private char operator;
private boolean reop = false;
}}

import java.awt.*;

import java.awt.event.*;

public class mm {

public static void main (String arg[])
{
Frame f1=new Frame("個人信息");
f1.setSize(300,200);
f1.setLocation(300, 240);
f1.setBackground(Color.blue);
f1.setLayout(new FlowLayout());

f1.add(new Label("姓名"));
f1.add(new TextField("zhl",25));
f1.add(new Label("手機號"));
f1.add(new TextField("3318816990",25));
f1.add(new Label("性別"));
f1.add(new TextField("女",25));
f1.add(new Label("籍貫"));
f1.add(new TextField("中國",25));
Button button1=new Button("ok");
button1.addActionListener(new abc());
f1.add( button1,BorderLayout.SOUTH);
Button button2=new Button("EXIT");
f1.add(button2,BorderLayout.EAST);
button2.addActionListener(new abc());

f1.addWindowListener(new close());
f1.setVisible(true);

}

package zhl;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.GridBagLayout;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class abc extends mm implements ActionListener
{

@Override
public void actionPerformed(ActionEvent ev) {
// TODO Auto-generated method stub

// System.out.println("hello world!");
Frame f2=new Frame("OK");
f2.setSize(300,200);
f2.setLocation(300, 240);
f2.setBackground(Color.lightGray);
f2.setLayout(new GridBagLayout());
f2.add(new Label("hello world！"));

f2.addWindowListener(new close());
f2.setVisible(true);
}
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

public class close implements WindowListener {

@Override
public void windowActivated(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口激活成功！");
}

@Override
public void windowClosed(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口關閉後成功！");
}

@Override
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub

System.out.println("窗口關閉成功！");
System.exit(0);
}

@Override
public void windowDeactivated(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口不活動！");
}

@Override
public void windowDeiconified(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口小化再恢復成功！");
}

@Override
public void windowIconified(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口最小化成功！");
}

@Override
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口打開成功！");
}

}

計算器界面與監聽事件