delinfowindow.java

一次数据结构的课程设计

package src;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class delInfoWindow extends JDialog{
	private JLabel l1 = null;
	private JLabel l2 = null;
	private JTextField t1 = null;
	private JTextField t2 = null;
	private JButton b1 = null;
	private JButton b2 = null;
	private Graph g;
 	private cityFile file;

	public delInfoWindow(JFrame f){
	super(f,"",true);
	setLayout(null);

	g = new Graph();
	file = new cityFile();
	file.inputfromInfoFile(g);

	 l1 = new JLabel("输入删除起始城市名:");
	 t1 = new JTextField(10);
	 l2 = new JLabel("输入删除终点城市名:");
	 t2 = new JTextField(10);

	 b1 = new JButton("确定");
	 b2 = new JButton ("取消");

	l1.reshape(20,30,150,20);
	t1.reshape(150,30,110,20);

	l2.reshape(20,65,150,20);
	t2.reshape(150,65,110,20);






	b1.reshape(60,110,65,25);
	b2.reshape(160,110,65,25);

	add(l1);
	add(t1);
	add(l2);
	add(t2);
	add(b1);
		b1.addActionListener(new
			ActionListener(){
				public void actionPerformed(ActionEvent event){
					if(t1.getText().equals("")||t2.getText().equals("")){
						JOptionPane.showMessageDialog(null,"城 市 信 息 不 能 为 空 !!");
						t1.grabFocus();
					}

					else{
							int from = g.changetoNum(t1.getText());
							int to	 = g.changetoNum(t2.getText());
							if(from<0 || to<0)
								JOptionPane.showMessageDialog(null,"城 市 信 息 不 存 在 !!");
							else
							{
								int result = JOptionPane.showConfirmDialog(null,t1.getText()+" 与 "+t2.getText()+
								"相关信息将完全删除?","",JOptionPane.OK_OPTION);
								if(result == JOptionPane.OK_OPTION)
								{
									if(g.deletEdge(from,to))
									{
										JOptionPane.showMessageDialog(null,"删 除 成 功 !!");
										file.outputtoInfoFile(g.records);
									}
									else
										JOptionPane.showMessageDialog(null,"城 市 信 息 不 存 在 !!");
								}
							}

						}
				}
		});
	add(b2);
		b2.addActionListener(new
			ActionListener(){
				public void actionPerformed(ActionEvent event){
						setVisible(false);
				}
		});
	setTitle("删除城市信息");
	setSize(300,200);
	setResizable(false);

	setLocation(370,280);

	}

}