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本文實例為大家分享了java swing實現答題系統的具體代碼，供大家參考，具體內容如下

基于java swing實現答題系統

如上圖所示，代碼親測可用，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用來跳轉

private int item1 = 0;

private int item2 = 1;

private int item3 = 2;

private int item4 = 3;

private JLabel[] FormulaLabels; // 用來存放表達式的各個項

private List<String> allResult; // 用來存放隨機出來的結果

private JTextField[] userResults; // 用來讓用戶輸入結果

private JLabel[] judge; // 用來顯示圖標，以顯示用戶輸入的結果是否正確

private List<String> inputResults = null; // 可以不要

private JTextField scoreField = null;

private int textCount = 1; // 用來記錄當前焦點的位置



public static void main(String[] args){

  sa s=new sa();



}



public sa() {

  // TODO Auto-generated constructor stub

  inputResults = new ArrayList<String>();

  // 實例化

  title = new JLabel("題目很簡單，認真答哦！~(每題1分，答對加1分，答錯不扣分！)");

  submit = new JButton("提交");

  submit.addActionListener(this);

  GridLayout layout = new GridLayout(21, 6);

  center = new JPanel(layout);

  // 調用方法實例化方法

  initLables();

  initUserRestult();

  initJudge();

  // 將各項填入到center面板(GridLayout)

  int count = 1;

  int formulaCount = 0;

  int userResultsCount = 0;

  int judgeCount = 0;

  while (count <= 120) {

   // 判斷count%6,確定要填哪個組件

   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("總分："));

  scoreField = new JTextField();

  scoreField.setEditable(false);

  center.add(scoreField);

  center.add(new JLabel());

  center.add(new JLabel());

  this.add(center, BorderLayout.CENTER);

  // 添加組件

  this.add(submit, BorderLayout.SOUTH);

  this.add(title, BorderLayout.NORTH);

  // 顯示

  this.setLocation(400, 10);

  this.setVisible(true);

  this.setSize(500, 700);

  this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  this.setTitle("簡單測試系統");

  try {

   Thread.sleep(500);

  } catch (InterruptedException e) {

   // TODO Auto-generated catch block

   e.printStackTrace();

  }

  userResults[0].requestFocus();

}



/**

  * 這個方法用來初始化算式各項的數組

  */

private void initLables() {

  int sum;

  int firstNumber;

  int secondNumber;

  allResult = new ArrayList<String>();

  // 建立算式標簽

  this.FormulaLabels = new JLabel[80];

  // 將數組中的每一個標簽都實例化

  for (int i = 0; i < 80; i++) {

   FormulaLabels[i] = new JLabel();

  }

  // 將表達式各項賦值內容，并將隨機數的和算出結果存入Arraylist中,以便后期核對結果使用

  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());

  // }

}



/**

  * 這個方法用來實例化userResults數組，并實例化里面的每一個JTextField

  */

private void initUserRestult() {

  userResults = new JTextField[20];

  for (int i = 0; i < 20; i++) {

   userResults[i] = new JTextField();

   userResults[i].setSize(20, 20);

   // 后加的監聽

   userResults[i].addKeyListener(this);

  }

}



/**

  * 這個方法用來實例化judge數組，并將里面的每一個Label實例化

  */

private void initJudge() {

  judge = new JLabel[20];

  for (int i = 0; i < 20; i++) {

   judge[i] = new JLabel("好好算呦");

  }

}



// 實現監聽方法，當用戶點擊提交后要做的事情

@Override

public void actionPerformed(ActionEvent arg0) {

  // TODO Auto-generated method stub

  int score = 0;

  for (int i = 0; i < 20; i++) {

   // 將用戶輸入的結果全部獲取，存入一個ArrayList中,可以不要

   inputResults.add(userResults[i].getText().toString().trim());

   System.out.println(userResults[i].getText().toString());

   // 取出來用戶輸入的答案和之前算好的結果去比較，不對就把后面的標簽設置為回答錯誤，

   // 如果正確就設置為回答正確

   String result = userResults[i].getText().toString().trim();

   if (result.equals(allResult.get(i))) {

    judge[i].setText("回答正確");

    judge[i].setForeground(Color.RED);

    score++;

   } else {

    judge[i].setText("回答錯誤");

    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



}

}