10月14日学习日志

今天改进了小学生出题的界面，可以进行选择出题范围和运算符。

代码为：

package math4;
import  java.awt.BorderLayout;
import  java.awt.Color;
import  java.awt.Font;
import java.awt.GridLayout;
import  java.awt.event.ActionEvent;
import  java.awt.event.ActionListener;
import  javax.swing.JButton;
import  javax.swing.JFrame;
import  javax.swing.JLabel;
import  javax.swing.JMenu;
import  javax.swing.JMenuBar;
import  javax.swing.JMenuItem;
import  javax.swing.JOptionPane;
import  javax.swing.JPanel;
import  javax.swing.JTextField;
public  class math4 extends  JFrame  implements  ActionListener{
  int  max= 20 ;
  int  MAX= 10 ;
  int  TYPE= 1 ;
  JLabel jlquestion[]= new  JLabel[20];
  JLabel jlAnswer[]= new  JLabel[20];
  JLabel jlTotal= new  JLabel( "共" +max+ "题" );
  JLabel jlcorrect[]= new  JLabel[20];
  JTextField jtf[]= new  JTextField[20];
  JMenuBar jmb= new  JMenuBar();
  JMenu jm= new  JMenu( "类型 " );
  JMenuItem jmi1= new  JMenuItem( "10以内加法" );
  JMenuItem jmi2= new  JMenuItem( "10以内减法" );
  JMenuItem jmi3= new  JMenuItem( "20以内加法" );
  JMenuItem jmi4= new  JMenuItem( "20以内减法" );
  JMenuItem jmi5= new  JMenuItem( "100以内加法" );
  JMenuItem jmi6= new  JMenuItem( "100以内减法" );
  JMenuItem jmi7= new  JMenuItem( "100以内乘法" );
  JMenuItem jmi8= new  JMenuItem( "100以内除法" );
  JButton jb1= new  JButton( "出题" );
  JButton jb2= new  JButton( "评卷" );
  JButton jb3= new  JButton( "答案" );
  JPanel jp1= new  JPanel();
  JPanel jp2= new  JPanel(new GridLayout(5,4));
  String[] question= new  String[max];
  String [] answer= new  String [max];

  math4(){
   super ( "小学数学测试" );
   for(int i=0;i<20;i++) {
         jtf[i]=new JTextField(3);
         jlquestion[i]=new JLabel("");
         jlAnswer[i]=new JLabel("");
         jlcorrect[i]= new  JLabel();
     }
   jlTotal.setFont( new  Font( null ,Font.PLAIN, 20 ));
   for(int i=0;i<20;i++) {
       jtf[i].setFont( new  Font( null ,Font.PLAIN, 20 ));
       jlAnswer[i].setFont( new  Font( null ,Font.PLAIN, 20 ));
       jlquestion[i].setFont( new  Font( null ,Font.PLAIN, 20 ));
       jlcorrect[i].setFont( new  Font( null ,Font.PLAIN, 20 ));
       jlcorrect[i].setForeground(Color.RED);
   }
   Question(MAX, TYPE);
   jb1.addActionListener( this );
   jb2.addActionListener( this );
   jb3.addActionListener( this );
   jmi1.addActionListener( this );
   jmi2.addActionListener( this );
   jmi3.addActionListener( this );
   jmi4.addActionListener( this );
   jmi5.addActionListener( this );
   jmi6.addActionListener( this );
   jmi7.addActionListener( this );
   jmi8.addActionListener( this );
   jm.add(jmi1);jm.add(jmi2);jm.add(jmi3);jm.add(jmi4);jm.add(jmi5);jm.add(jmi6);jm.add(jmi7);jm.add(jmi8);
   jmb.add(jm);
   setJMenuBar(jmb);
   jp1.add(jlTotal);jp1.add(jb1);jp1.add(jb2);jp1.add(jb3);
   for(int i=0;i<20;i++) {
       jp2.add(jlquestion[i]);jp2.add(jtf[i]);jp2.add(jlcorrect[i]);jp2.add(jlAnswer[i]);
   }
   add(jp1,BorderLayout.NORTH);
   add(jp2,BorderLayout.CENTER);
   setSize(1500,500);
   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   setLocationRelativeTo( null );
   setVisible( true );
  }
  public  void  actionPerformed(ActionEvent ae) {
      if(ae.getSource()==jb1) {
          for(int i=0;i<20;i++) {
                 jlquestion[i].setText(question[i]);
                 jtf[i].setEnabled( true );
             }
       }
      if (ae.getSource()==jb2){
          for(int i=0;i<20;i++) {
                 jlquestion[i].setText(question[i]);
                 if(jtf[i].getText().trim().equals(answer[i])) {
                     jlcorrect[i].setText("√"); 
                 }
                 else jlcorrect[i].setText("×"); 
                 jtf[i].setEnabled( true );
             }
      }
   if (ae.getSource()==jb3){
       for(int i=0;i<20;i++) {
             jlquestion[i].setText(question[i]);
             jlAnswer[i].setText( "答案:"+answer[i] );
             if(jtf[i].getText().trim().equals(answer[i])) {
                 jlcorrect[i].setText("√"); 
             }
             else jlcorrect[i].setText("×"); 
             jtf[i].setEnabled( true );
         }
   }
   if(ae.getSource()==jmi1){
       for(int i=0;i<20;i++) {
           jlquestion[i].setText("");
           jlAnswer[i].setText("");
           jlcorrect[i].setText("");
           jtf[i].setText("");
       }
    MAX= 10 ;TYPE= 1 ;Question(MAX,TYPE);
   }
   if(ae.getSource()==jmi2){
       for(int i=0;i<20;i++) {
           jlquestion[i].setText("");
           jlAnswer[i].setText("");
           jlcorrect[i].setText("");
           jtf[i].setText("");
       }
    MAX= 10 ;TYPE= 2 ;Question(MAX,TYPE);
   }
   if(ae.getSource()==jmi3){
       for(int i=0;i<20;i++) {
           jlquestion[i].setText("");
           jlAnswer[i].setText("");
           jlcorrect[i].setText("");
           jtf[i].setText("");
       }
    MAX= 20 ;TYPE= 1 ;Question(MAX,TYPE);
   }
   if(ae.getSource()==jmi4){
       for(int i=0;i<20;i++) {
           jlquestion[i].setText("");
           jlAnswer[i].setText("");
           jlcorrect[i].setText("");
           jtf[i].setText("");
       }
    MAX= 20 ;TYPE= 2 ;Question(MAX,TYPE);
   }
   if(ae.getSource()==jmi5){
       for(int i=0;i<20;i++) {
           jlquestion[i].setText("");
           jlAnswer[i].setText("");
           jlcorrect[i].setText("");
           jtf[i].setText("");
       }
    MAX= 100 ;TYPE= 1 ;Question(MAX,TYPE);
   }
   if(ae.getSource()==jmi6){
       for(int i=0;i<20;i++) {
           jlquestion[i].setText("");
           jlAnswer[i].setText("");
           jlcorrect[i].setText("");
           jtf[i].setText("");
       }
    MAX= 100 ;TYPE= 2 ;Question(MAX,TYPE);
   }
   if(ae.getSource()==jmi7){
       for(int i=0;i<20;i++) {
           jlquestion[i].setText("");
           jlAnswer[i].setText("");
           jlcorrect[i].setText("");
           jtf[i].setText("");
       }
    MAX= 100 ;TYPE= 3 ;Question(MAX,TYPE);
   }
   if(ae.getSource()==jmi8){
       for(int i=0;i<20;i++) {
           jlquestion[i].setText("");
           jlAnswer[i].setText("");
           jlcorrect[i].setText("");
           jtf[i].setText("");
       }
    MAX= 100 ;TYPE= 4 ;Question(MAX,TYPE);
   }
  }
  public  static  void  main(String[] args) {
          new math4();
      }
  
  public  void Question( int  MAX, int  TYPE) {
   int a,b;
   for(int i=0;i<20;i++){
    a=( int )(Math.random()*MAX+ 1 );
    b=( int )(Math.random()*MAX+ 1 );
    switch (TYPE){
     case  1 :answer[i]=String.valueOf(a+b); break ;
     case  2 :answer[i]=String.valueOf(a-b); break ;
     case  3 :answer[i]=String.valueOf(a*b); break ;
     case  4 :
         while(b==0||a%b!=0) {
             a=( int )(Math.random()*MAX+ 1 );
             b=( int )(Math.random()*MAX+ 1 );
         }
       answer[i]=String.valueOf(a/b);
      break ;
    }
    switch (TYPE) {
        case 1:question[i]=String.valueOf(a)+"+"+String.valueOf(b)+"=";break;
        case 2:question[i]=String.valueOf(a)+"-"+String.valueOf(b)+"=";break;
        case 3:question[i]=String.valueOf(a)+"*"+String.valueOf(b)+"=";break;
        case 4:question[i]=String.valueOf(a)+"/"+String.valueOf(b)+"=";break;
    }
    }
   }
}

运行结果为：