用Java编写计算器，代码展示！

偏执的太偏执、 2023-07-06 13:29 10阅读 0赞

用Java编写计算器，代码展示！  
import java.awt.BorderLayout;  
import java.awt.Dimension;  
import java.awt.GridLayout;  
import java.awt.event.ActionEvent;  
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 \{ // 继承窗体类JFrame  
/\*\*  
\*  
\*/  
private static final long serialVersionUID = 6626440733001287873L;  
private JTextField textField;

public static void main(String args[]) {
        try {
            UIManager.setLookAndFeel("");
        } catch (Throwable e) {
            e.printStackTrace();
        }
        ButtonArrayExample frame = new ButtonArrayExample();
        frame.setVisible(true); // 设置窗体可见，默认为不可见
    }
    
    public ButtonArrayExample() {
        super(); // 继承父类的构造方法
        BorderLayout borderLayout = (BorderLayout) getContentPane().getLayout();
        borderLayout.setHgap(20);
        borderLayout.setVgap(10);
        setTitle("计算器"); // 设置窗体的标题
        setBounds(100, 100, 290, 282); // 设置窗体的显示位置及大小
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设置窗体关闭按钮的动作为退出
        textField = new JTextField();
        textField.setHorizontalAlignment(SwingConstants.TRAILING);
        textField.setPreferredSize(new Dimension(12, 50));
        getContentPane().add(textField, BorderLayout.NORTH);
        textField.setColumns(10);
        final GridLayout gridLayout = new GridLayout(4, 0); // 创建网格布局管理器对象
        gridLayout.setHgap(5); // 设置组件的水平间距
        gridLayout.setVgap(5); // 设置组件的垂直间距
        JPanel panel = new JPanel(); // 获得容器对象
        panel.setLayout(gridLayout); // 设置容器采用网格布局管理器
        getContentPane().add(panel, BorderLayout.CENTER);
        String[][] names = { { "1", "2", "3", "＋" }, { "4", "5", "6", "－" }, { "7", "8", "9", "×" }, { ".", "0", "=", "÷" } };
        JButton[][] buttons = new JButton[4][4];
        for (int row = 0; row < names.length; row++) {
            for (int col = 0; col < names.length; col++) {
                buttons[row][col] = new JButton(names[row][col]); // 创建按钮对象
                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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