以下範例展示了如何在基於swing的應用程式中顯示沒有圖示的訊息警報。
使用以下API -
JOptionPane()
- 建立標準對話方塊。JOptionPane.showMessageDialog()
- 顯示訊息警告。JOptionPane.PLAIN_MESSAGE
- 將警告訊息標記為沒有圖示的純文字訊息。範例
package com.yiibai.swingdemo;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class SwingTester {
public static void main(String[] args) {
createWindow();
}
private static void createWindow() {
JFrame frame = new JFrame("Swing顯示沒有圖示的訊息對話方塊");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
createUI(frame);
frame.setSize(560, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static void createUI(final JFrame frame){
JPanel panel = new JPanel();
LayoutManager layout = new FlowLayout();
panel.setLayout(layout);
JButton button = new JButton("點選我!");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(frame, "沒有圖示對話方塊的訊息~",
"Swing對話方塊", JOptionPane.PLAIN_MESSAGE);
}
});
panel.add(button);
frame.getContentPane().add(panel, BorderLayout.CENTER);
}
}
執行上面範例程式碼,得到以下結果: