planeinformation.java

飞机航班的查询系统

package planeInformation;

import java.awt.*;
import java.awt.event.*;
import java.io.*;

class PlaneInformation implements ActionListener {
	Frame mainFrame;
	Frame inputFrame;
	Frame searchFrame;
	TextArea plaInfo;
	Label lb[] = new Label[4];
	Label lb2[] = new Label[2];
	TextField tf[] = new TextField[4];
	TextField tf2[] = new TextField[2];
	Button btn[] = new Button[3];
	Button btn2[] = new Button[2];
	Panel p1, p2, p3, p4;
	IOOperation ioo;
	Plane pla;
	Plane plane[] = new Plane[100];

	public PlaneInformation() {
		/**
		 * 构造函数，初始话主窗口信息 set mainframe
		 */
		mainFrame = new Frame("PlaneInformation");
		mainFrame.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
		// 菜单栏File选项添加
		MenuItem item1 = new MenuItem("Record");
		MenuItem item2 = new MenuItem("Search");
		MenuItem item3 = new MenuItem("Modify");
		MenuItem item4 = new MenuItem("Exit");
		MenuItem item5 = new MenuItem("About");
		item1.addActionListener(this);
		item2.addActionListener(this);
		item3.addActionListener(this);
		item4.addActionListener(this);
		item5.addActionListener(this);
		Menu menu1 = new Menu("File");
		menu1.add(item1);
		menu1.add(item2);
		menu1.add(item3);
		menu1.addSeparator();
		menu1.add(item4);
		Menu menu2 = new Menu("Help");
		menu2.add(item5);
		MenuBar mb = new MenuBar();
		mb.add(menu1);
		mb.add(menu2);
		mainFrame.setMenuBar(mb);
		// 文本框控制区域设置
		plaInfo = new TextArea();
		plaInfo.setFont(new Font("serif", Font.PLAIN, 18));// 字体格式
		mainFrame.add(plaInfo);
		mainFrame.setSize(400, 250);// 大小
		mainFrame.setLocation(200, 100);// 位置
		mainFrame.setVisible(true);// 显示Frame
		/**
		 * 记录飞机信息的窗口设置
		 */
		inputFrame = new Frame();
		inputFrame.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				inputFrame.setVisible(false);
			}
		});
		p1 = new Panel(new GridLayout(4, 2));
		p2 = new Panel();
		String lbname[] = { "FlightNumber:", "StartCity:", "Destination:",
				"FlightTime" };
		String btnname[] = { "Save", "Delete", " Exit " };
		// Record窗口中各字段名称、按钮设置
		for (int i = 0; i < 4; i++) {
			lb[i] = new Label(lbname[i]);
			tf[i] = new TextField(15);
			p1.add(lb[i]);
			p1.add(tf[i]);
		}
		for (int i = 0; i < 3; i++) {
			btn[i] = new Button(btnname[i]);
			btn[i].addActionListener(this);
			p2.add(btn[i]);
		}
		btn[2].setActionCommand("input");// **用来获取对象的标签或事先为这个对象设置的命令名**//
		inputFrame.add(p1, BorderLayout.CENTER);
		inputFrame.add(p2, BorderLayout.SOUTH);
		inputFrame.pack();
		inputFrame.setLocationRelativeTo(mainFrame);
		/**
		 * set searchFrame which is used to search plane information
		 */
		searchFrame = new Frame("Search plane");
		searchFrame.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				searchFrame.setVisible(false);
			}
		});
		p3 = new Panel(new GridLayout(2, 2));
		p4 = new Panel();
		String lbname2[] = { "FlightNumber :", "StartCity:" };
		String btnname2[] = { "Search", " Exit " };
		for (int i = 0; i < 2; i++) {
			lb2[i] = new Label(lbname2[i]);
			tf2[i] = new TextField(15);
			p3.add(lb2[i]);
			p3.add(tf2[i]);
		}
		for (int i = 0; i < 2; i++) {
			btn2[i] = new Button(btnname2[i]);
			btn2[i].addActionListener(this);
			p4.add(btn2[i]);
		}
		btn2[1].setActionCommand("search");
		searchFrame.add(p3, BorderLayout.CENTER);
		searchFrame.add(p4, BorderLayout.SOUTH);
		searchFrame.pack();
		searchFrame.setLocationRelativeTo(mainFrame);
		/**
		 * IO operation object
		 */
		ioo = new IOOperation();
		plane = ioo.getAllPlane();
	}

	public void actionPerformed(ActionEvent e) {
		/**
		 * 按钮功能实现
		 */
		if (e.getSource() instanceof MenuItem) {
			MenuItem mi = (MenuItem) e.getSource();
			if (mi.getLabel().equals("Record")) {// 如果点击Record
				inputFrame.setTitle("Record");
				inputFrame.setSize(200, 200);
				for (int i = 0; i < 4; i++)
					tf[i].setText("");
				p2.remove(btn[1]);// 如果是记录信息，删除‘删除’按钮
				btn[0].setActionCommand("input");// 按钮‘保存’功能实现
				inputFrame.setVisible(true);
			} else if (mi.getLabel().equals("Search")) {
				searchFrame.setVisible(true);
			} else if (mi.getLabel().equals("Modify")) {
				inputFrame.setTitle("Modify");
				if (pla != null) {// 修改信息时，文本框信息显示
					tf[0].setText(pla.getFlightNumber());
					tf[1].setText(pla.getStartCity());
					tf[2].setText(pla.getDestination());
					tf[3].setText(pla.getFlightTime());
				}
				p2.remove(btn[2]);
				p2.add(btn[1]);
				p2.add(btn[2]);
				btn[0].setActionCommand("modify");
				inputFrame.setVisible(true);
			} else if (mi.getLabel().equals("Exit"))
				System.exit(0);
			else if (mi.getLabel().equals("About")) {
				final Dialog progInfo = new Dialog(mainFrame, "ProgInfo", true);
				progInfo.addWindowListener(new WindowAdapter() {
					public void windowClosing(WindowEvent e) {
						progInfo.dispose();
					}
				});
				progInfo.setLayout(new FlowLayout());
				Label l = new Label("Plane Information System");
				progInfo.add(l);
				progInfo.setSize(200, 80);
				progInfo.setLocationRelativeTo(mainFrame);
				progInfo.setVisible(true);
			}
		}
		/**
		 * Button action
		 */
		else {
			Button btn = (Button) e.getSource();
			if (btn.getLabel().equals("Save")) {// 点击保存时，个文本框必须非空
				if (!tf[0].getText().equals("") && !tf[1].getText().equals("")
						&& !tf[2].getText().equals("")
						&& !tf[3].getText().equals("")) {
					Plane p = new Plane();
					// Plane p = new Plane(tf[0].getText(), tf[1].getText(),
					// tf[2]
					// .getText(), tf[3].getText());
					p.setFlightNumber(tf[0].getText());
					p.setStartCity(tf[1].getText());
					p.setDestination(tf[2].getText());
					p.setFlightTime(tf[3].getText());
					System.out.println(p.getFlightNumber());
					if (btn.getActionCommand().equals("input")) {
						for (int i = 0; i < plane.length; i++) {
							if (plane[i] == null) {
								plane[i] = p;
								System.out.println(p.getFlightNumber());
								break;
							}
						}
						ioo.write(plane);
					} else {
						for (int i = 0; i < plane.length; i++) {
							if (plane[i].equals(pla)) {
								plane[i] = p;
								break;
							}
						}
						ioo.write(plane);
					}
				}
				inputFrame.setVisible(false);
				plaInfo.setText("");
			} else if (btn.getLabel().equals("Delete")) {
				int index = 200;
				if (pla != null) {
					for (int i = 0; i < plane.length; i++) {
						if (plane[i] != null && plane[i].equals(pla)) {
							index = i;
							if (i != plane.length - 1)
								plane[i] = plane[i + 1];
							else
								plane[i] = null;
						}
						if (i == index && plane[i + 1] == null)
							break;
						else if (i > index && i < plane.length - 1) {
							plane[i] = plane[i + 1];
							if (i == plane.length - 1)
								plane[i] = null;
						}
					}
					ioo.write(plane);
				}
				pla = null;
				inputFrame.setVisible(false);
				plaInfo.setText("");
			} else if (btn.getLabel().equals("Search")) {
				pla = null;
				if (!tf2[0].getText().equals("")
						|| !tf2[1].getText().equals("")) {
					String condition = "";
					if (!tf2[0].getText().equals("")) {
						condition = tf2[0].getText();
						System.out.println(tf2[0].getText());
					} else {

						condition = tf2[1].getText();
						System.out.println(tf2[1].getText());
					}
					for (int i = 0; i < plane.length; i++) {
						if (plane[i] != null) {
							System.out.println(plane[i].getFlightNumber());
							if (plane[i].getFlightNumber().equals(condition)
									|| plane[i].getStartCity()
											.equals(condition)) {
								System.out.println(plane[i].getFlightNumber());
								pla = plane[i];
								break;
							}
						}
					}
				}
				if (pla != null) {
					plaInfo.setText("FlightNumber: " + pla.getFlightNumber()
							+ "\n" + "StartCity: " + pla.getStartCity() + "\n"
							+ "Destination: " + pla.getDestination() + "\n"
							+ "FlightTime: " + pla.getFlightTime() + "\n");
				}
				searchFrame.setVisible(false);
			} else if (btn.getLabel().equals(" Exit "))
				if (btn.getActionCommand().equals("input"))
					inputFrame.setVisible(false);
				else
					searchFrame.setVisible(false);
		}
	}

}