delcityinfowindow.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 delCityInfoWindow extends JDialog{

private Graph g;
private cityFile file;

		public delCityInfoWindow(JFrame f) {
			super(f,"删除城市信息",true);

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

			setLayout(null);
			l = new JLabel("城市名:");
			l.reshape(30,30,60,20);
			t = new JTextField(10);
			t.reshape(80,30,100,20);
			b1 = new JButton("确定");
			b1.reshape(35,80,65,20);
		b1.addActionListener(new
			ActionListener(){
				public void actionPerformed(ActionEvent event){
				if(t.getText().equals("")){
					JOptionPane.showMessageDialog(null,"城 市 名 不 能 为 空!!");
					t.grabFocus();
				}
					else{
							if(!g.delCity(t.getText()))
								JOptionPane.showMessageDialog(null,"城 市 名 不 存 在!!");
							else
							    JOptionPane.showMessageDialog(null,"城 市 名 删 除 成 功!!");

					}
				}
		});

			b2 = new JButton("取消");
			b2.reshape(120,80,65,20);

		b2.addActionListener(new
			ActionListener(){
				public void actionPerformed(ActionEvent event){
					setVisible(false);
				}
		});

		add(l);
		add(t);
		add(b1);
		add(b2);
		setSize(230,160);
		setLocation(400,200);


		}
		private JLabel l;
		private JTextField t;
		private JButton b1;
		private JButton b2;






}