java swing 答题系统

如上图所示，代码亲测可用，如下：

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 stubinputResults = 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 blocke.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@Overridepublic void actionPerformed(ActionEvent arg0) {// TODO Auto-generated method stubint 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));}@Overridepublic void keyPressed(KeyEvent e) {// TODO Auto-generated method stubif (e.getKeyCode() == KeyEvent.VK_ENTER) {userResults[textCount].requestFocus();if (textCount < 19) {textCount++;}}}@Overridepublic void keyTyped(KeyEvent e) {// TODO Auto-generated method stub}@Overridepublic void keyReleased(KeyEvent e) {// TODO Auto-generated method stub}}