JOptionPane_两个辅助类_this.setborder(borderfactory.createtitledborder("布-优快云博客

本文链接：https://blog.youkuaiyun.com/tdy002/article/details/7405624

本文提供了一个使用Java Swing库中的JOptionPane类创建对话框的示例程序。该程序演示了如何通过JOptionPane显示不同类型的对话框，并展示了如何自定义对话框的内容组件。

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package swing;

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Rectangle2D;
import java.util.Date;

import javax.swing.*;

/**
* JOptionPane 的各种组合
*/
public class OptionDialogTest {
public static void main(String[] args) {
  EventQueue.invokeLater(new Runnable() {
   @Override
   public void run() {
    OptionDialogFrame frame = new OptionDialogFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
   }
  });
}
}

class SampleComponent extends JComponent {
public void paintComponent(Graphics g) {
  Graphics2D g2 = (Graphics2D) g;
  Rectangle2D rect = new Rectangle2D.Double(0, 0, this.getWidth()-1, this.getHeight()-1);
  g2.setPaint(Color.YELLOW);
  g2.fill(rect);
  g2.setPaint(Color.BLUE);
  g2.draw(rect);
}

public Dimension getPreferredSize() {
  return new Dimension(10, 10);
}
}

class ButtonPanel extends JPanel {
public ButtonPanel(String title, String... options) {
  this.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(), title));
  this.setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
  group = new ButtonGroup();

  for(String option : options) {
   JRadioButton b = new JRadioButton(option);
   b.setActionCommand(option);
   this.add(b);
   group.add(b);
   b.setSelected(option == options[0]);
  }
}

public String getSelection() {
  return group.getSelection().getActionCommand();
}

private ButtonGroup group;
}