samplejdialog.java

初学的好东西值得一看看欢迎下载观看使用

import javax.swing.JDialog;
import java.awt.Toolkit;
import java.awt.Dimension;
import java.awt.Window;
class SampleJDialog extends JDialog{
	SampleJDialog(){
		setTitle("示例对话框");
		setModal(true);
		setSize(150,200);
		setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
		CenterWindow cWin=new CenterWindow();
		cWin.center(this);
		show();
	}
	public static void main(String[] args){
		SampleJDialog sjd=new SampleJDialog();
	}
}

class CenterWindow{
	public void center(Window win){
		Toolkit tkit=Toolkit.getDefaultToolkit();
		Dimension screenSize=tkit.getScreenSize();
		Dimension windowSize=win.getSize();
		if(windowSize.height>windowSize.height){
			windowSize.height=windowSize.height;
		}
		if(windowSize.width>windowSize.width){
			windowSize.width=windowSize.width;
		}
		win.setLocation((screenSize.width-windowSize.width)/2,(screenSize.height-windowSize.height)/2);
	}
}