import java.awt.BorderLayout; import java.awt.Color; import java.awt.Font; 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 B extends JFrame implements ActionListener{ //界面的设计 int max=20; int MAX=10;
int TYPE=1; JLabel jlTitle=new JLabel();
JLabel jl=new JLabel(""); JLabel jlAnswer=new JLabel(""); JLabel jlTotal=new JLabel("共"+max+"题");
JLabel jlcorrect=new JLabel(); JTextField jtf=new JTextField(3); JMenuBar jmb=new JMenuBar(); JMenu jm=new JMenu("类型 "); //建立一个可选菜单 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"); JMenuItem jmi9=new JMenuItem("真分数的计算");
JButton jb1=new JButton("上一题"); JButton jb2=new JButton("下一题"); //创建button JButton jb3=new JButton("评卷"); JButton jb4=new JButton("答案"); JPanel jp1=new JPanel(); JPanel jp2=new JPanel(); JPanel jp3=new JPanel(); String[] question=new String[max]; //利用字符串列表来存储问题 int[] answer=new int[max]; String[] studentAnswer=new String[max]; //利用字符串列表来存储答案 boolean[]correct=new boolean[max]; int count=1; boolean submitFlag=false; B(){ super("小学数学测试"); jlTitle.setFont(new Font(null,Font.PLAIN,20)); jlTotal.setFont(new Font(null,Font.PLAIN,20)); ///字体的设置 jlAnswer.setFont(new Font(null,Font.PLAIN,20)); jl.setFont(new Font(null,Font.PLAIN,20)); jlcorrect.setFont(new Font(null,Font.PLAIN,20)); jlcorrect.setForeground(Color.RED); jtf.setFont(new Font(null,Font.PLAIN,20)); fillQuestion(); jb1.addActionListener(this); jb2.addActionListener(this); jb3.addActionListener(this); jb4.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); // 菜单栏的添加 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(jlTitle);jp1.add(jlTotal);jp1.add(jb3);jp1.add(jb4); jp2.add(jl);jp2.add(jtf);jp2.add(jlcorrect);jp2.add(jlAnswer); //利用panel实现多条文档显示输出 jp3.add(jb1);jp3.add(jb2); add(jp1,BorderLayout.NORTH); add(jp2,BorderLayout.CENTER); add(jp3,BorderLayout.SOUTH); setSize(300, 200); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //使用完解放退出 setLocationRelativeTo(null); setVisible(true); ///窗口可视化 } @Override public void actionPerformed(ActionEvent ae) { if(ae.getSource()==jb1){ if(submitFlag==false){ try{ //点击上一题时抓取用户的不正常输入 float tempanswer=Integer.valueOf(jtf.getText().trim()); //去除掉多余的空格 studentAnswer[count-1]=jtf.getText().trim(); if(count==1) count=max; else count--; jlTitle.setText("第"+count+"题"); jl.setText(question[count-1]); jtf.setText(""); if(studentAnswer[count-1]==null||studentAnswer[count-1].equals("")) { ///若是出现空白输入，则提醒用户 } else { jtf.setText(studentAnswer[count-1]); } }catch(Exception nfe){ JOptionPane.showMessageDialog(this, "请输入正整数!"); jtf.requestFocus(); } } else{ if(count==1)count=max; else count--; jlTitle.setText("第"+count+"题");
jl.setText(question[count-1]); jlAnswer.setText(""); jtf.setEnabled(false); jtf.setText(studentAnswer[count-1]); jb4.setEnabled(true); if(correct[count-1]==true){ jlcorrect.setText("√"); // 显示答案正确与否 } else{ jlcorrect.setText("×"); } } }
if(ae.getSource()==jb2){ if(submitFlag==false){ try{ //点击下一题时抓取用户的不正常输入 float tempanswer=Integer.valueOf(jtf.getText().trim());
studentAnswer[count-1]=jtf.getText().trim(); if(count==max)count=1; else count++; jlTitle.setText("第"+count+"题"); jl.setText(question[count-1]); jtf.setText(""); if(studentAnswer[count-1]==null||studentAnswer[count-1].equals("")) { } else { jtf.setText(studentAnswer[count-1]); } } catch(Exception nfe) { JOptionPane.showMessageDialog(this, "请输入正整数!"); jtf.requestFocus(); }
} else { if(count==max)count=1; else count++; jlTitle.setText("第"+count+"题"); jl.setText(question[count-1]); jlAnswer.setText(""); jtf.setEnabled(false); jtf.setText(studentAnswer[count-1]); jb4.setEnabled(true); if(correct[count-1]==true){ jlcorrect.setText("√"); } else{ jlcorrect.setText("×"); } }
} if(ae.getSource()==jb3){ try{ //点击评卷时检测用户的不正常输入，并给出全卷情况 float tempanswer=Integer.valueOf(jtf.getText().trim()); studentAnswer[count-1]=jtf.getText().trim(); for(int i=0;i<max;i++){ if(studentAnswer[i]==null||studentAnswer[i].equals("")){ correct[i]=false; } else if(Float.valueOf(studentAnswer[i])==answer[i]){ correct[i]=true; } else{ correct[i]=false; } } int correctAnswer=0; for(int i=0;i<max;i++){ if(correct[i]==true){ correctAnswer++; } } String s="共"+max+"道题\n"; s=s+"答对"+correctAnswer+"道题\n"; s=s+"答错"+(max-correctAnswer)+"道题\n"; s=s+"成绩"+String.format("%.2f",(100*(float)correctAnswer/max))+"分\n"; JOptionPane.showMessageDialog(this, s); submitFlag=true; jb4.setEnabled(true); jtf.setEnabled(false); jtf.setText(studentAnswer[count-1]); if(correct[count-1]==true){ jlcorrect.setText("√"); } else{ jlcorrect.setText("×"); } } catch(Exception nfe){ JOptionPane.showMessageDialog(this, "请输入正整数!"); jtf.requestFocus(); } } if(ae.getSource()==jb4){ jlAnswer.setText(String.valueOf(answer[count-1])); } if(ae.getSource()==jmi1){ MAX=10;TYPE=1;fillQuestion(); //菜单的选项 } if(ae.getSource()==jmi2){ MAX=10;TYPE=2;fillQuestion(); } if(ae.getSource()==jmi3){ MAX=20;TYPE=1;fillQuestion(); } if(ae.getSource()==jmi4){ MAX=20;TYPE=2;fillQuestion(); } if(ae.getSource()==jmi5){ MAX=100;TYPE=1;fillQuestion(); } if(ae.getSource()==jmi6){ MAX=100;TYPE=2;fillQuestion(); } if(ae.getSource()==jmi7){ MAX=100;TYPE=3;fillQuestion(); } if(ae.getSource()==jmi8){ MAX=100;TYPE=4;fillQuestion(); } }
public static void main(String[] args) { new B(); } public void fillQuestion(){ count=1; for(int i=0;i<max;i++){ String s=randomQuestion(MAX,TYPE); //问题的随机放出 question[i]=s.substring(0,s.indexOf("=")+1); answer[i]=Integer.valueOf(s.substring(s.indexOf("=")+1)); } studentAnswer=new String[max]; correct=new boolean[max]; jl.setText(question[0]); jlTitle.setText("第"+count+"题"); jlcorrect.setText(""); jlAnswer.setText(""); submitFlag=false; jtf.setEnabled(true); jtf.setText(""); jb4.setEnabled(false); } public String randomQuestion(int MAX,int TYPE) { String s=""; int answer=MAX+1; while(answer>MAX||answer<0){ ///random随机出正整数 int a=(int)(Math.random()*MAX+1); int b=(int)(Math.random()*MAX+1); int c=(int)(Math.random()MAX+1); int d=(int)(Math.random()MAX+1); switch(TYPE){ case 1:answer=a+b;break; case 2:answer=a-b;break; case 3:answer=ab;break; case 4: if(a%b==0){ answer=a/b; } break; } if(answer<=MAX&&answer>=0){ s=s+a; switch(TYPE){ case 1:s=s+"+";break; case 2:s=s+"-";break; case 3:s=s+"";break; case 4:s=s+"/";break; }
s=s+b+"="+answer; } } return s; } }