graphprog.java

一个简单的绘图程序

package grapro;
import javax.swing.UIManager;
import java.awt.*;
public class GraphProg
{
	boolean packFrame=false;
	public GraphProg()
	{
		GraFrame frame=new GraFrame();
		if(packFrame)
		{
			frame.pack();
		}
		else
		{
			frame.validate();
		}
		Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();
		Dimension frameSize=frame.getSize();
		if(frameSize.height>screenSize.height)
		{frameSize.height=screenSize.height;
		}
		if(frameSize.width>screenSize.width)
		{frameSize.width=screenSize.width;
		}
		frame.setLocation((screenSize.width-frameSize.width)/2,
		                 (screenSize.height-frameSize.height)/2);
		frame.setVisible(true);
	}
	public static void main(String[] args)
	{
		try{
		UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		}catch(Exception e){
			e.printStackTrace();
		}
		new GraphProg();
	}
}