addcourse.java

学生成绩管理系统：能输入学科

package 学生考试成绩分析程序;

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

public class AddCourse extends JFrame implements ActionListener
{
        JLabel jlNumber,jlName,jlCreditHour,jlPeriod;
        JTextField jtNumber,jtName,jtCreditHour,jtPeriod,jtCheck;
        JButton jbCancel,jbOk;

     public AddCourse()
     {   

        jlNumber=new JLabel("编号");
        jlName=new JLabel("名称");
        jlCreditHour=new JLabel("学时");
        jlPeriod=new JLabel("学分");
        
        jtNumber=new JTextField("");
        jtName=new JTextField("");
        jtCreditHour=new JTextField("");
        jtPeriod=new JTextField("");
        jtCheck=new JTextField("");
        jbOk=new JButton("确定");
        jbCancel=new JButton("返回");
        
        JPanel jpJButton=new JPanel();
        JPanel jpLabel=new JPanel();
        jpLabel.setLayout(new GridLayout(0,4));
        jpLabel.add(jlNumber); 
        jpLabel.add(jtNumber);
        jpLabel.add(jlName); 
        jpLabel.add(jtName);
        jpLabel.add(jlCreditHour);
        jpLabel.add(jtCreditHour);
        jpLabel.add(jlPeriod); 
        jpLabel.add(jtPeriod);
        jpJButton.add(jbOk);
        jpJButton.add(jbCancel);
        jbOk.addActionListener(this);
        jbCancel.addActionListener(this);

        getContentPane().add(jpLabel,BorderLayout.NORTH);
        getContentPane().add(jpJButton,BorderLayout.SOUTH);
   

     }
     public void actionPerformed(ActionEvent e)
     {
        if(e.getSource()==jbOk)
        {
          String number = null,name = null,creditHour = null,period = null,check=null;
          number =jtNumber.getText();
          name=jtName.getText();
          creditHour =jtCreditHour.getText();
          period =jtPeriod.getText();
          check=jtCheck.getText();
          if((!number.equals(check))&&(!name.equals(check))&&(!creditHour.equals(check))&&(!period.equals(check)))
          try{
               BufferedWriter output=new   BufferedWriter(new FileWriter("course.txt",true)); 
               output.write( number+"*"+name+"*"+creditHour+"*"+period+"*");
               this.setVisible(false);
               output.close();
               JOptionPane.showMessageDialog(null, "增加成功");
          }
          catch(Exception ex){
               JOptionPane.showMessageDialog(null, "增加失败");
          }
          else 
              JOptionPane.showMessageDialog(null, "输入错误，请重新输入");
      }
     else if(e.getSource()==jbCancel)
     {
       this.setVisible(false);
    }
     }

  }