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
}
}
}
}
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。