java按钮控件数组实现计算器界面示例分享
思路如下: 创建一个类,通过extends使其继承窗体类JFrame; 复制代码 代码如下: 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("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel"); } 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("按钮数组实现计算器界面 "); // 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 } } } } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |