JAVA学生管理系统 第5页

JAVA学生管理系统 第5页
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

/**
 * 课程信息管理模块
 * 根据课程编号查询课程信息，以供调用者修改或删除
 */
public class CourseInfoSearchCnum extends JDialog implements ActionListener{
 Container contentPane;
 String[] s;
 //框架的大小
 Dimension faceSize = new Dimension(300, 100);
 JLabel jLabel1 = new JLabel();
 JComboBox selectCnum;
 JButton searchInfo = new JButton();
 
 public CourseInfoSearchCnum(JFrame frame) {
  super(frame, true);
  this.setResizable(false);
  try {
   Init();
  }
  catch (Exception e) {
   e.printStackTrace();
  }
  //设置运行位置，使对话框居中
  Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
  this.setLocation( (int) (screenSize.width - 400) / 2 ,
      (int) (screenSize.height - 300) / 2 + 45);
 }
 
 private void Init() throws Exception {
  this.setSize(faceSize);
  contentPane = this.getContentPane();
  contentPane.setLayout(new FlowLayout());

  jLabel1.setText("请输入或者选择课程号:");
  jLabel1.setFont(new Font("Dialog",0,12));
  contentPane.add(jLabel1);
  
  CrsBean getId = new CrsBean();
  s = getId.getAllId();

  selectCnum = new JComboBox(s);
  selectCnum.setSelectedItem(null);
  selectCnum.setEditable(true);
  selectCnum.setFont(new Font("Dialog",0,12));
  contentPane.add(selectCnum);

  searchInfo.setText("查询");
  searchInfo.setFont(new Font("Dialog",0,12));
  contentPane.add(searchInfo);

  selectCnum.addActionListener(this);
  searchInfo.addActionListener(this);
 }

 /**
  * 事件处理
  */
 public void actionPerformed(ActionEvent e) {
  Object obj = e.getSource();
  if (obj == selectCnum) { //退出
   this.dispose();
  }
  else if (obj == searchInfo) { //修改
   this.dispose();
  }
 }

 /**
  * 返回选择的学号
  */
 public String getCnum(){
  return (String)this.selectCnum.getSelectedItem();
 }
}
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;

/**
 * 课程信息查询模块
 * 根据课程名称查询课程的信息
 */
public class CourseSearchCname extends JFrame implements ActionListener{
 Container contentPane;
 //框架的大小
 Dimension faceSize = new Dimension(300, 100);
 JLabel jLabel1 = new JLabel();
 JTextField cName = new JTextField(8);
 JButton searchInfo = new JButton();

 
 public CourseSearchCname() {
  //设置标题
  this.setTitle("按课程名称查询");
  this.setResizable(false);
  //设置程序图标
  this.setIconImage(getImage("icon.gif"));

  try {
   Init();
www.751com.cn
  Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
  this.setLocation( (int) (screenSize.width - 400) / 2 ,
      (int) (screenSize.height - 300) / 2 + 45);

 }
 
 private void Init() throws Exception {
  this.setSize(faceSize);
  contentPane = this.getContentPane();
  contentPane.setLayout(new FlowLayout());

  jLabel1.setText("请输入课程名称: ");
  jLabel1.setFont(new Font("Dialog",0,12));
  contentPane.add(jLabel1);

  cName.setText(null);
  cName.setFont(new Font("Dialog",0,12));
  contentPane.add(cName);

  searchInfo.setText("确定");
  searchInfo.setFont(new Font("Dialog",0,12));
  contentPane.add(searchInfo);

  searchInfo.addActionListener(this);

 }

 /**
  * 事件处理
  */
 public void actionPerformed(ActionEvent e) {
  Object obj = e.getSource();
  if (obj == searchInfo) { //查询
   ResultCourse rC = new ResultCourse("cname",cName.getText());
   this.dispose();
  }
 }

 /**
  * 通过给定的文件名获得图像
  */
 Image getImage(String filename) {
  URLClassLoader urlLoader = (URLClassLoader)this.getClass().
   getClassLoader();
  URL url = null;
  Image image = null;
  url = urlLoader.findResource(filename);
  image = Toolkit.getDefaultToolkit().getImage(url);
  MediaTracker mediatracker = new MediaTracker(this);
  try {
   mediatracker.addImage(image, 0);
   mediatracker.waitForID(0);
  }
  catch (InterruptedException _ex) {
   image = null;
  }
  if (mediatracker.isErrorID(0)) {
   image = null;
  }  return image; }}

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