error.java

java编写的最短路径算法

package user_interface;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Point2D;

import javax.swing.JFrame;
import javax.swing.JToggleButton;


public class Error extends JFrame{
	public String display;
	private JFrame parentWin;
	public Error(String s){
		super("Error");
		parentWin=this;
		display=s;
		setSize(Constant.frameWidth, Constant.frameHeight/3);
		
		
		setVisible(true);
		addButton();
		repaint();
	}
	public void paint(Graphics g) {
		super.paint(g);
		g.setFont(new Font("SansSerif", Font.BOLD, 16));
		g.setColor(Color.black);
		g.drawString(display, (Constant.frameWidth-display.length()*6)/2,
					Constant.frameHeight/7);
	}
	public void addButton(){
		//Button OK
		JToggleButton jbbb=new JToggleButton();
		jbbb.setText("OK");
		jbbb.setBounds(new Rectangle(Constant.frameWidth/2-Constant.boxWidth/2, Constant.frameHeight/8, Constant.boxWidth,
				Constant.boxHeight));
		jbbb.setToolTipText("OK.");
		this.getContentPane().add(jbbb);
			
		jbbb.setVisible(true);
		jbbb.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event){
				parentWin.dispose();
		}}
		
		);

	}
	
}