我的彩票游戏正在运转，但我需要改变计算机生成中奖号码的方式。起初我生成了一个随机数组，但我得到重复。为了解决这个问题，我改用了一个30个数字的数组并使用数组中的前六个数字。类似于在抽奖中下降的前6个球是如何使用的。当我运行该程序时，它似乎在compareResults()崩溃。在itemStateChanged(ItemEvent e)我呼叫randomNum()和shuffle()。我不确定为什么它不会比较结果，因为我最终得到randNum[]无论如何
我使用什么方法来生成它。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.Arrays;
import java.util.Collections;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class JLottery2 extends JFrame implements ItemListener {
private String[] lotteryNumbers = { "1", "2", "3", "4", "5", "6", "7", "8",
"9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19",
"20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30" };
private JPanel jp1 = new JPanel();
private JPanel jp2 = new JPanel();
private JPanel jp3 = new JPanel(new GridLayout(3, 10, 5, 5));
private JLabel jl1 = new JLabel("The Lottery Game!!!!!");
private JLabel jl2 = new JLabel(
"To play, pick six number that match the randomly selected numbers.");
private FlowLayout layout = new FlowLayout();
private GridLayout gridBase = new GridLayout(3, 1, 5, 5);
private GridLayout grid = new GridLayout(3, 10, 5, 5);
private Font heading = new Font("Palatino Linotype", Font.BOLD, 24);
private Font bodyText = new Font("Palatino Linotype", Font.BOLD, 14);
private Color color1 = new Color(4, 217, 225);
private Color color2 = new Color(4, 225, 129);
private int maxNumber = 6;
final int LOTTERY_NUMBER_MAX = 30;
private int counter = 0;
private int[] randomNum;
private int[] userPickedNumbers;
private int matchedNumbers = 0;
private JCheckBox checkBox[] = new JCheckBox[lotteryNumbers.length];
private String temp;
Container con = getContentPane();
public JLottery2() {
super("The Lottery Game");
con.setLayout(gridBase);
con.add(jp1);
jp1.setLayout(layout);
jp1.add(jl1);
jl1.setFont(heading);
jp1.setBackground(color1);
con.add(jp2);
jp2.setLayout(layout);
jp2.add(jl2);
jl2.setFont(bodyText);
jp2.setBackground(color1);
con.add(jp3);
jp3.setLayout(grid);
for (int i = 0; i < lotteryNumbers.length; i++) {
// JCheckBox checkBox[] = new JCheckBox[lotteryNumbers.length];
checkBox[i] = new JCheckBox(lotteryNumbers[i]);
jp3.add(checkBox[i]);
jp3.setBackground(color2);
checkBox[i].addItemListener(this);
}
setSize(500, 300);
setDefaultCloseOperation(EXIT_ON_CLOSE);
userPickedNumbers = new int[maxNumber];
}
public void itemStateChanged(ItemEvent e) {
/*
* actions taken as user checks the JCheckBoxes
*/
if (e.getStateChange() == ItemEvent.SELECTED && counter < maxNumber) {
temp = ((JCheckBox) e.getSource()).getText();
((JCheckBox) e.getSource()).setEnabled(false);
int intTemp = Integer.parseInt(temp);
userPickedNumbers[counter] = intTemp;
counter++;
System.out.println("add to counter");
System.out.println("the .getText() returns "
+ ((JCheckBox) e.getSource()).getText());
System.out.println("the tempoaray int is " + intTemp);
System.out.println("the number of picks is " + counter);
System.out.println("**************************************");
}
/*
* actions taken when the user has chosen 6 JCheckboxes
*/
if (counter == maxNumber) {
System.out.println("the picks have maxxed out");
JCheckboxSetVisibleFalse();
randNumber();
//shuffle();
compareResults();
}
}
/*
* creates an array of random lottery numbers
* array of 30 numbers is created then shuffled. The
* First 6 elements are place in the randomNum[]
*/
public void randNumber() {
randomNum = new int[maxNumber];
for (int i = 0; i < maxNumber; i++) {
randomNum[i] = ((int) (Math.random() * 100) % lotteryNumbers.length + 1);
}
System.out.println("the randomNum array is "
+ Arrays.toString(randomNum));
}
public void shuffle(){
Integer[] randomNumTemp = new Integer[LOTTERY_NUMBER_MAX];
for (int i = 0; i < LOTTERY_NUMBER_MAX; i++) {
randomNumTemp[i] = i+1;
}
//shuffle numbers
Collections.shuffle(Arrays.asList(randomNumTemp));
//add first 6 numbers to the randomNumTemp to randNum array
Integer[] randomNum = new Integer[maxNumber];
for (int i = 0; i < randomNum.length; i++) {
randomNum[i] = randomNumTemp[i];
}
}
/*
* compares the userPickedNumbers[] to the randomNum[]
*/
private void compareResults() {
System.out.println("the user picks are "
+ Arrays.toString(userPickedNumbers));
int i = 0;// user
int j = 0;// random
do {
if (userPickedNumbers[i] != randomNum[j]
&& j < maxNumber - 1) {
System.out.println("the user picked " + userPickedNumbers[i]
+ " the random number is " + randomNum[j]);
System.out.println("wrong guess " + j);
System.out
.println("the location of the element in the fisrt array is "
+ i);
System.out
.println("the location of the element in the second array is "
+ j);
j++;
} else if (userPickedNumbers[i] != randomNum[j] && j == 5) {
System.out.println(userPickedNumbers[i] + randomNum[j]);
System.out.println("one last wrong guess " + j);
System.out.println("the location of the first array is " + i);
j = 0;
i++;
} else if (userPickedNumbers[i] == randomNum[j]) {
matchedNumbers++;
i++;
j = 0;
System.out.println("the number of correct guesses are "
+ matchedNumbers);
System.out.println("the value of j is" + j);
System.out.println("the value of i is" + i);
} else if (randomNum[j] == maxNumber
&& userPickedNumbers[i] == randomNum[j]) {
j = 0;
i++;
matchedNumbers++;
}
} while (i < maxNumber);
}
private void JCheckboxSetVisibleFalse() {
for (int i = 0; i < lotteryNumbers.length; i++) {
checkBox[i].setVisible(false);
}
}
public static void main(String[] args) {
JLottery2 frame = new JLottery2();
frame.setVisible(true);
}
}
答案 0 :(得分：1)
您没有将新的随机数混洗数组保存回临时数组中。我不认为Collections.shuffle使用.asList方法会做到这一点。只需将其保存回变量即可。将来，请使用调试器！逐行逐步查看该方法，以找到结果不是您想要的结果。