基于java swing实现答题系统

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.GridLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 
import java.util.ArrayList; 
import java.util.List; 
import java.util.Random; 
 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JTextField; 
 
/** 
 * 2017-01-09 
 * @author Koow 
 * 
 */ 
public class sa extends JFrame implements ActionListener, KeyListener { 
 private JLabel title = null; 
 private JButton submit = null; 
 private JPanel center = null; 
 // items用来跳转 
 private int item1 = 0; 
 private int item2 = 1; 
 private int item3 = 2; 
 private int item4 = 3; 
 private JLabel[] FormulaLabels; // 用来存放表达式的各个项 
 private List<String> allResult; // 用来存放随机出来的结果 
 private JTextField[] userResults; // 用来让用户输入结果 
 private JLabel[] judge; // 用来显示图标，以显示用户输入的结果是否正确 
 private List<String> inputResults = null; // 可以不要 
 private JTextField scoreField = null; 
 private int textCount = 1; // 用来记录当前焦点的位置 
  
 public static void main(String[] args){ 
  sa s=new sa(); 
   
 } 
 
 public sa() { 
  // TODO Auto-generated constructor stub 
  inputResults = new ArrayList<String>(); 
  // 实例化 
  title = new JLabel("题目很简单，认真答哦！~(每题1分，答对加1分，答错不扣分！)"); 
  submit = new JButton("提交"); 
  submit.addActionListener(this); 
  GridLayout layout = new GridLayout(21, 6); 
  center = new JPanel(layout); 
  // 调用方法实例化方法 
  initLables(); 
  initUserRestult(); 
  initJudge(); 
  // 将各项填入到center面板(GridLayout) 
  int count = 1; 
  int formulaCount = 0; 
  int userResultsCount = 0; 
  int judgeCount = 0; 
  while (count <= 120) { 
   // 判断count%6,确定要填哪个组件 
   if (count % 6 == 1 || count % 6 == 2 || count % 6 == 3 || count % 6 == 4) { 
    center.add(FormulaLabels[formulaCount]); 
    formulaCount++; 
   } else if (count % 6 == 5) { 
    center.add(userResults[userResultsCount]); 
    userResultsCount++; 
   } else if (count % 6 == 0) { 
    center.add(judge[judgeCount]); 
    judgeCount++; 
   } 
   count++; 
  } 
  center.add(new JLabel()); 
  center.add(new JLabel()); 
  center.add(new JLabel("总分：")); 
  scoreField = new JTextField(); 
  scoreField.setEditable(false); 
  center.add(scoreField); 
  center.add(new JLabel()); 
  center.add(new JLabel()); 
  this.add(center, BorderLayout.CENTER); 
  // 添加组件 
  this.add(submit, BorderLayout.SOUTH); 
  this.add(title, BorderLayout.NORTH); 
  // 显示 
  this.setLocation(400, 10); 
  this.setVisible(true); 
  this.setSize(500, 700); 
  this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
  this.setTitle("简单测试系统"); 
  try { 
   Thread.sleep(500); 
  } catch (InterruptedException e) { 
   // TODO Auto-generated catch block 
   e.printStackTrace(); 
  } 
  userResults[0].requestFocus(); 
 } 
 
 /** 
  * 这个方法用来初始化算式各项的数组 
  */ 
 private void initLables() { 
  int sum; 
  int firstNumber; 
  int secondNumber; 
  allResult = new ArrayList<String>(); 
  // 建立算式标签 
  this.FormulaLabels = new JLabel[80]; 
  // 将数组中的每一个标签都实例化 
  for (int i = 0; i < 80; i++) { 
   FormulaLabels[i] = new JLabel(); 
  } 
  // 将表达式各项赋值内容，并将随机数的和算出结果存入Arraylist中,以便后期核对结果使用 
  while (item4 < 80) { 
   firstNumber = new Random().nextInt(99) + 1; 
   FormulaLabels[item1].setText(String.valueOf(firstNumber)); 
   FormulaLabels[item2].setText("+"); 
   secondNumber = new Random().nextInt(99) + 1; 
   FormulaLabels[item3].setText(String.valueOf(secondNumber)); 
   FormulaLabels[item4].setText("="); 
   sum = firstNumber + secondNumber; 
   allResult.add(String.valueOf(sum)); 
   item1 += 4; 
   item2 += 4; 
   item3 += 4; 
   item4 += 4; 
  } 
  // for(int i=0;i<80;i++){ 
  // System.out.println(FormulaLabels[i].getText()); 
  // } 
 } 
 
 /** 
  * 这个方法用来实例化userResults数组，并实例化里面的每一个JTextField 
  */ 
 private void initUserRestult() { 
  userResults = new JTextField[20]; 
  for (int i = 0; i < 20; i++) { 
   userResults[i] = new JTextField(); 
   userResults[i].setSize(20, 20); 
   // 后加的监听 
   userResults[i].addKeyListener(this); 
  } 
 } 
 
 /** 
  * 这个方法用来实例化judge数组，并将里面的每一个Label实例化 
  */ 
 private void initJudge() { 
  judge = new JLabel[20]; 
  for (int i = 0; i < 20; i++) { 
   judge[i] = new JLabel("好好算呦"); 
  } 
 } 
 
 // 实现监听方法，当用户点击提交后要做的事情 
 @Override 
 public void actionPerformed(ActionEvent arg0) { 
  // TODO Auto-generated method stub 
  int score = 0; 
  for (int i = 0; i < 20; i++) { 
   // 将用户输入的结果全部获取，存入一个ArrayList中,可以不要 
   inputResults.add(userResults[i].getText().toString().trim()); 
   System.out.println(userResults[i].getText().toString()); 
   // 取出来用户输入的答案和之前算好的结果去比较，不对就把后面的标签设置为回答错误， 
   // 如果正确就设置为回答正确 
   String result = userResults[i].getText().toString().trim(); 
   if (result.equals(allResult.get(i))) { 
    judge[i].setText("回答正确"); 
    judge[i].setForeground(Color.RED); 
    score++; 
   } else { 
    judge[i].setText("回答错误"); 
    judge[i].setForeground(Color.GREEN); 
   } 
  } 
  scoreField.setText(String.valueOf(score)); 
 } 
 
 @Override 
 public void keyPressed(KeyEvent e) { 
  // TODO Auto-generated method stub 
  if (e.getKeyCode() == KeyEvent.VK_ENTER) { 
   userResults[textCount].requestFocus(); 
   if (textCount < 19) { 
    textCount++; 
   } 
  } 
 } 
 
 @Override 
 public void keyTyped(KeyEvent e) { 
  // TODO Auto-generated method stub 
 
 } 
 
 @Override 
 public void keyReleased(KeyEvent e) { 
  // TODO Auto-generated method stub 
 
 } 
}