buttonmethod.java

java中图形用户界面的设计

//button类方法介绍
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class buttonMethod
{
	public static void main(String args[])
	{
		 myFrame Frame1 = new myFrame("My first frame");
		 Frame1.show();
	   Frame1.pack();
	}
}

class myFrame extends JFrame
{
	JButton button1,button2,button3,button4;
	myFrame(String str)
	{
		super(str);
		setSize(300,200);
		Icon icon = new ImageIcon("lady.gif");
		//四个构造函数
		button1 = new JButton();
		button2 = new JButton("SOUTH");
		button3 = new JButton(icon);
		button4 = new JButton("East",icon);
		
		Container Conpane = getContentPane();
		Conpane.add(button1,BorderLayout.NORTH);
		Conpane.add(button2,BorderLayout.SOUTH);
		Conpane.add(button3,BorderLayout.WEST);
		Conpane.add(button4,BorderLayout.EAST);
		
		//其它方法
		String btName = button2.getText();
		button1.setText("North");
		Icon icon1 = button3.getIcon();
		button1.setIcon(icon1);
		button4.setHorizontalTextPosition(AbstractButton.LEFT);
	//AbstractButton.CENTER,AbstractButton.LEFT,AbstractButton.RIGHT
		button4.setVerticalTextPosition(AbstractButton.TOP);
	//AbstractButton.TOP,AbstractButton.BOTTOM,AbstractButton.CENTER
		button1.setMnemonic('N');
		button2.setEnabled(false);
		
		addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});
	}
}