message.java

哈工大实验课源代码

import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
 import java.util.*;
 import java.io.*;
 
 public class Message extends JApplet
 {
  public void init()
  {
   Container contentPane = getContentPane();
   MessagePanel panel= new  MessagePanel();
   contentPane.add(panel);
  }
  public static void main(String args[])
  {
   MessagesFrame frame=new MessagesFrame();
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.show(); 
  }
 }
 
 class MessagesFrame extends JFrame    
 {
  public MessagesFrame() 
  {
   setTitle("java");
   setSize(450,500);
   MessagePanel messageinsert=new MessagePanel();
   Container content=getContentPane();
   content.add(messageinsert);      
  }
 }
 
 class MessagePanel extends JPanel 
 {
  public MessagePanel()
  {
   student[0]=new Student("Alice");
   student[1]=new Student("Alice");     
   student[2]=new Student("Bob");    
   student[3]=new Student("Caul");      
   student[4]=new Student("Dark");       
   student[5]=new Student("Eve");
 
   course[0]=new Course("Java");
   course[1]=new Course("C");
 
   setLayout(null);
 
   p1=new JPanel();
   p1.setLayout(new GridLayout(2,7));         
   p1.add(new Label("姓名"));
   name=new JTextField(6);
   p1.add(name);
   p1.add(new Label("科目"));
   message=new JTextField(6); 
   p1.add(message);
   p1.add(new Label("分数"));
   score=new JTextField("",6);
   p1.add(score);
   log=new JButton("加入");
   p1.add(log);
   p1.add(new Label("姓名"));
   aname=new JTextField(6);
   p1.add(aname);
   p1.add(new Label("科目"));
   amessage=new JTextField(6);
   p1.add(amessage);
   p1.add(new Label(""));
   p1.add(new Label(""));
 
   alog=new JButton("查询");
   p1.add(alog);
   p4=new JButton("全员成绩");
 
   ActionListener Record=new RecordAction();
   log.addActionListener(Record);
 
   ActionListener Search=new SearchAction();
   alog.addActionListener(Search);
 
   ActionListener Print=new PrintAction();
   p4.addActionListener(Print);
 
   out=new JTextArea();
   out.setEditable(false);
 
   scrollPane= new JScrollPane(out);  
   setLayout(new BorderLayout());       
   add(p1, BorderLayout.NORTH);
   add(p4, BorderLayout.SOUTH);   
 
   add(scrollPane,BorderLayout.CENTER);
 
  }
  private JButton log,alog,p4;
  private JPanel p1,p2,p3; 
  private JTextField name,aname;
  private JTextField message,amessage;
  private JTextField score;
  private JTextArea out;
  private JScrollPane scrollPane;
  private String  bmessage;
  private String  bname;
  private String  cscore;
  Student[] student=new Student[6]; 
  Course[] course=new Course[2];
 
  private class PrintAction implements ActionListener
  {
   public PrintAction()
   {
   }
   int k=0;
   File ff=new File("c:\\bin\\urlt.txt");
   String tem=null;
   String[]   str1   =   new   String[3];
   public void actionPerformed(ActionEvent event)
   {
    try
    {
  
        BufferedReader buffer=new BufferedReader(new FileReader(ff)); 
     while (   (tem  =   buffer.readLine())   !=   null)
     {
      str1 =tem.split(" ");
      for (int j=1;j<6;j++)
      {
       if (str1[0].equals(student[j].getStudentName()))
       {
        k=j;
        break;
       }
      }
      if ("Java".equals(str1[1]))
      {
       student[k].setCourseName1("Java");
       student[k].setScore1(str1[2]);
      }
      if ("C".equals(str1[1]))
      {
       student[k].setCourseName2("C");
       student[k].setScore2(str1[2]);
      }
     }
    }
    catch(Exception e3)
    {
    }
    for (int j=1;j<6;j++)
    {
     if (("Java").equals(student[j].getCourseName1()))
      out.append("姓名"+student[j].getStudentName()+"    课程"+student[j].getCourseName1()+"   分数"+student[j].getScore1()+
      "\n");
     if (("C").equals(student[j].getCourseName2()))
      out.append("姓名"+student[j].getStudentName()+"    课程"+student[j].getCourseName2()+"   分数"+student[j].getScore2()+
      "\n");
    }
   }
  }
  private class RecordAction  implements ActionListener
  {
   public RecordAction()
   {
   }
   String name0=student[0].getStudentName();
   String name1=student[1].getStudentName();
   String name2=student[2].getStudentName();
   String name3=student[3].getStudentName();
   String name4=student[4].getStudentName();
   String name5=student[5].getStudentName();
 
   String courseN0=course[0].getCourseName();
   String courseN1=course[1].getCourseName();
 
   String outPut = "C:\\bin";
   File t = new File(outPut,"urlt.txt");
   StringBuffer ab = new StringBuffer();
 
   public void actionPerformed(ActionEvent event)
   {
    int ID=0;
    int p=1;
    int q=1;
    int c=1;
 
    try
    {
     int temp=Integer.parseInt(score.getText());
     if (temp>=0&&temp<=100)
      q=-1;         
 
     if (message.getText().equals(courseN0))
     {             
      c=-1;             
     }
     if (message.getText().equals(courseN1))       
     {          
      c=-1;         
     }
     if (name.getText().equals(name0))            
      p=-1;
 
     if (name.getText().equals(name1))            
     {          
      p=-1;
      ID=1;
     }
     if (name.getText().equals(name2))            
     {          
      p=-1;
      ID=2;
     }           
     if (name.getText().equals(name3))            
     {          
      p=-1;
      ID=3;
     } 
     if (name.getText().equals(name4))            
     {          
      p=-1;
      ID=4;
     }
     if (name.getText().equals(name5))            
     {          
      p=-1;
      ID=5;
     }
     if (p==1||(name.getText().equals(""))||q==1||(score.getText().equals(""))||c==1||(message.getText().equals("")))
      throw new Exception();                
 
     out.setText(" 姓名:  "+name.getText()+"    科目: "+
      message.getText()+"  "+ "成绩: "+ score.getText()+"\n");
 
     if (message.getText().equals(courseN0))
     {
      student[ID].setCourseName1(message.getText());
      student[ID].setScore1(score.getText());
     }
     if (message.getText().equals(courseN1))
     {
      student[ID].setCourseName2(message.getText());
      student[ID].setScore2(score.getText());
     }
     ab.append(name.getText()+" "+message.getText()+" "+score.getText()+"\r\n");
 
     DataOutputStream outs = new DataOutputStream(
      new FileOutputStream(t));
     outs.write(ab.toString().getBytes());
     outs.close();
     name.setText(null);
     message.setText(null);
     score.setText(null);
    }
    catch(Exception e1)
    {
     if (name.getText().equals("")||score.getText().equals("")||message.getText().equals("")) 
      JOptionPane.showMessageDialog(null,"请录入完整的学生信息");
 
     if (p==1)
     {             
      JOptionPane.showMessageDialog(null,"录入的学生姓名错误");
      name.setText(null);
     }
     if (c==1)       
     {
      JOptionPane.showMessageDialog(null,"输入的课程名称有误");              
      message.setText(null);     
     }
     if (q==1)       
     {
      JOptionPane.showMessageDialog(null,"录入的分数应在0---100之间");              
      score.setText(null);                      
     }
    }
   }
  }
  private class SearchAction implements ActionListener
  {
   public SearchAction()
   {
   }
   public void actionPerformed(ActionEvent event)
   {
    out.setText("");
    int p=1;
    int q=1;
    int k=0;
    File f=new File("c:\\bin\\urlt.txt");
    String temp=null;
    String[]   str   =   new   String[3];  
 
    try
    {
     BufferedReader buffer=new BufferedReader(new FileReader(f)); 
     while (   (temp   =   buffer.readLine())   !=   null)
     {
      str =temp.split(" ");
      for (int j=1;j<6;j++)
      {
       if (str[0].equals(student[j].getStudentName()))
       {
        k=j;
        break;
       }
      }
      if ("Java".equals(str[1]))
      {
       student[k].setCourseName1("Java");
       student[k].setScore1(str[2]);
      }
      if ("C".equals(str[1]))
      {
       student[k].setCourseName2("C");
       student[k].setScore2(str[2]);
      }
     }
     for (int i=0;i<6;i++)
     {
      if (aname.getText().equals(student[i].getStudentName()))
      {
       p=-1;
       if (amessage.getText().equals(student[i].getCourseName1()))
       {
        out.setText("姓名"+student[i].getStudentName()+"    课程"+student[i].getCourseName1()+"   分数"+student[i].getScore1()+
         "\n\n");
        q=-1;
       }
       if (amessage.getText().equals(student[i].getCourseName2()))
       {
        out.setText("姓名"+student[i].getStudentName()+"    课程"+student[i].getCourseName2()+"   分数"+student[i].getScore2()+
         "\n\n");
        q=-1;
       }
      }
     }
     if (p==1||q==1)
      throw new Exception();
 
    }
    catch(Exception e2)
    {
     if (p==1)
      JOptionPane.showMessageDialog(null,"输入的学生姓名错误");
     if (q==1)
      JOptionPane.showMessageDialog(null,"输入的课程名称错误");
 
    }  
    aname.setText(null);
    amessage.setText(null);
   }
  }
}
class Student
 {
  public Student(String sn)
  {
   StudentName=sn;
  }
  public String getStudentName()
  {
   return StudentName;
  }
  public void setCourseName1(String name1)
  {
   CourseName1=name1;
  }
  public void setCourseName2(String name2)
  {
   CourseName2=name2;
  }
  public String getCourseName1()
  {
   return CourseName1;
  }
  public String getCourseName2()
  {
   return CourseName2;
  }
  public String getScore1()
  {
   return Score1;
  }
  public String getScore2()
  {
   return Score2;
  }
  public void setScore1(String score)
  {
   Score1=score;
  }
  public void setScore2(String score)
  {
   Score2=score;
  }
  private String StudentName;
  private String CourseName1;
  private String CourseName2;
  private String Score1;
  private String Score2;
 
 }
 
 class Course
 {
  public Course(String aCoursename)
  {
   Coursename=aCoursename;
  }
  public String getCourseName()
  {
   return Coursename;
  }
  private String Coursename;
}