基于java swing实现答题系统

本文实例为大家分享了java swing实现答题系统的具体代码，供大家参考，具体内容如下

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 

  }
} 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。

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