-----------------siwuxie095
工程名:TestJOptionPane
包名:com.siwuxie095.showdialog
类名:TestMessageDialog.java
工程结构目录如下:
代码:
package com.siwuxie095.showdialog;
import java.awt.BorderLayout; import java.awt.EventQueue;
import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import javax.swing.border.EmptyBorder;
import com.sun.java.swing.plaf.windows.WindowsLookAndFeel;
import javax.swing.JButton; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent;
public class TestMessageDialog extends JFrame {
private JPanel contentPane;
/** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { TestMessageDialog frame = new TestMessageDialog(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); }
/** * Create the frame. */ public TestMessageDialog() { try { UIManager.setLookAndFeel(new WindowsLookAndFeel()); } catch (UnsupportedLookAndFeelException e1) { e1.printStackTrace(); } setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 450, 300); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); contentPane.setLayout(new BorderLayout(0, 0)); setContentPane(contentPane);
JButton btnshowmessagedialog = new JButton("显示消息框(showMessageDialog)"); btnshowmessagedialog.setFocusable(false);
//为 按钮 添加鼠标点击事件 btnshowmessagedialog.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) {
/** * 直接通过静态方法调用 * 需要指定父级窗体,消息,标题,消息类型 * 返回值是 void,即不会向系统返回任何信息 * 即消息框仅仅是为了向用户传达信息 * 没有关闭消息框时,后面的主窗体是完全无法操作的(即 阻塞) */ JOptionPane.showMessageDialog(TestMessageDialog.this, "NullPointerException","Error", JOptionPane.ERROR_MESSAGE); } }); contentPane.add(btnshowmessagedialog, BorderLayout.NORTH); }
} |
将窗体 JFrame 的 LookAndFeel 设定为 Windows
在根面板 contentPane 的上方添加一个 JButton,
将其 focusable 属性设为 false
为 JButton 添加 mouseClicked 事件,点击 按钮 弹出消息框
运行程序:
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