firstframe.java

一个用java语言编写的基于数据库的系统

import javax.swing.*;
import java.awt.*;
public class FirstFrame{
    public static MainClass mainclass=new MainClass();
    private JWindow window =new JWindow();
    public FirstFrame(){
    Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();
    JLabel jb=new JLabel(new ImageIcon("image/1.gif"));
    window.add(jb,BorderLayout.CENTER);
    window.setSize(450,300);
    int w=window.getSize().width;
    int h=window.getSize().height;
    int x=(dim.width-w)/2;
    int y=(dim.height-h)/2;
    window.setLocation(x,y);
}
public void hidden(){ 
	window.setVisible(false);
}
public void show(){
	window.setVisible(true);
}
public static void main(String[]a){
	FirstFrame JW=new FirstFrame();
	JW.show();
	Thread td=new Thread();
	try{
		td.sleep(3000);
	}
	catch(InterruptedException ex){
		System.out.println("sleep error!");
	}
	JW.hidden();
	mainclass.setTitle("欢迎进入郑州市公交车管理系统");
	mainclass.setSize(420,180);
	mainclass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	mainclass.setLocationRelativeTo(null);
	mainclass.setVisible(true);
}
}