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 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

	}
}