编程实现有一个标题为“计算”的窗口，窗口的布局为FlowLayout;有4个按钮，分别为“加”、“减”、“乘”、“除”;另外，窗口还有三个文本框，单击任一按钮，将上面两个文本框中的数字进行相应的运算，在第三个文本框中显示结果。

下面是一个Java Swing实现的示例代码，你可以根据需要修改和优化： ```java import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class CalculatorWindow extends JFrame { private JTextField num1Field, num2Field, resultField; public CalculatorWindow() { setTitle("计算"); setSize(300, 160); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel contentPane = new JPanel(); contentPane.setLayout(new FlowLayout()); num1Field = new JTextField(10); num2Field = new JTextField(10); resultField = new JTextField(10); resultField.setEditable(false); JButton addButton = new JButton("加"); addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int num1 = Integer.parseInt(num1Field.getText()); int num2 = Integer.parseInt(num2Field.getText()); int result = num1 + num2; resultField.setText(String.valueOf(result)); } }); JButton subButton = new JButton("减"); subButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int num1 = Integer.parseInt(num1Field.getText()); int num2 = Integer.parseInt(num2Field.getText()); int result = num1 - num2; resultField.setText(String.valueOf(result)); } }); JButton mulButton = new JButton("乘"); mulButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int num1 = Integer.parseInt(num1Field.getText()); int num2 = Integer.parseInt(num2Field.getText()); int result = num1 * num2; resultField.setText(String.valueOf(result)); } }); JButton divButton = new JButton("除"); divButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int num1 = Integer.parseInt(num1Field.getText()); int num2 = Integer.parseInt(num2Field.getText()); if (num2 == 0) { resultField.setText("除数不能为0"); } else { int result = num1 / num2; resultField.setText(String.valueOf(result)); } } }); contentPane.add(new JLabel("数字1：")); contentPane.add(num1Field); contentPane.add(new JLabel("数字2：")); contentPane.add(num2Field); contentPane.add(addButton); contentPane.add(subButton); contentPane.add(mulButton); contentPane.add(divButton); contentPane.add(new JLabel("结果：")); contentPane.add(resultField); setContentPane(contentPane); } public static void main(String[] args) { CalculatorWindow frame = new CalculatorWindow(); frame.setVisible(true); } } ```