180day(边框示例代码)

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本文提供了一个使用Java Swing实现的边框样式的示例代码，通过按钮选择不同的边框样式应用于面板上。此外，还介绍了如何不借助额外变量进行数值交换的方法。

《2018年4月8日》【连续180天】

标题：边框示例代码;

内容：

1.边框：

public class BorderFrame extends JFrame
{
		 private JPanel demoPanel ;
		 private JPanel buttonPanel ;
		 private ButtonGroup group;
		 public BorderFrame()
		{
		demoPanel = new JPanel ();
		buttonPanel = new JPanel ();
		group = new ButtonGroup();
		addRadioButton("Lowered bevel ", BorderFactory.createLoweredBevelBorder());
		addRadioButton("Raised bevel ", BorderFactory.createRaisedBevelBorder());
		addRadioButton("Etched", BorderFactory.createEtchedBorder()) ;
		addRadioButton("Line", BorderFactory.createLineBorder(Color.BLUE)) ;
		addRadioButton("Matte", BorderFactory.createMatteBorder(10, 10, 10, 10, Color.BLUE)) ;
		addRadioButton("Empty", BorderFactory.createEmptyBorder()) ;
		Border etched = BorderFactory.createEtchedBorder() ;
		Border titled = BorderFactory.createTitledBorder(etched, "Border types");
		buttonPanel.setBorder(titled) ;
		setLayout(new GridLayout(2, 1)) ;
		add(buttonPanel) ;
		add(demoPanel) ;
		pack();
		}
		 public void addRadioButton(String buttonName, Border b)
		 {
		 JRadioButton button = new JRadioButton(buttonName);
		 button.addActionListener(event -> demoPanel.setBorder(b)) ;
		 group.add(button) ;
		 buttonPanel .add(button) ;
		 }
	public static void main(String[] args)
	{
		EventQueue.invokeLater(()->
		{
		JFrame frame =new BorderFrame();
		frame.setTitle("Border");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
		}
				);
	}

}