Java 我能';我不明白我收到的错误
我似乎有一个问题,在代码中,在终端中,出于某种原因,我得到了一个错误,但似乎无法理解实际的问题。下面是我得到的错误: 线程“main”java.lang.ArrayIndexOutOfBoundsException中的异常:5 在lotkety.compareNumbers(LotteryApplication.java:59) 位于LotteryApplication.main(LotteryApplication.java:106) 这是我的代码:Java 我能';我不明白我收到的错误,java,Java,我似乎有一个问题,在代码中,在终端中,出于某种原因,我得到了一个错误,但似乎无法理解实际的问题。下面是我得到的错误: 线程“main”java.lang.ArrayIndexOutOfBoundsException中的异常:5 在lotkety.compareNumbers(LotteryApplication.java:59) 位于LotteryApplication.main(LotteryApplication.java:106) 这是我的代码: import java.util.Rand
import java.util.Random;
import java.util.Scanner;
class Lottery {
/**
* The lottery numbers.
*/
private int lotteryNumbers[];
/**
* Default Constructor.
*
* The class should use the Random class (from the Java API) to generate a
* random number in the range of 0 through 9 for each element in the array.
*/
public Lottery() {
Random rand = new Random(System.currentTimeMillis());
lotteryNumbers = new int[5];
for (int i = 0; i < lotteryNumbers.length; i++) {
lotteryNumbers[i] = rand.nextInt(10);
}
}
/**
* The class should also have a method that accepts an array of 5 integers
* that represent a person's lottery picks. The method is to compare the
* corresponding elements in the two arrays and return the number of digits
* that match.
*/
public int compareNumbers(int[] usersNumbers) {
int match = 0;
if (usersNumbers.length == lotteryNumbers.length) {
for (int i = 0; i < lotteryNumbers.length; i++) {
for(int j = 0; j < lotteryNumbers.length; i++) {
if (usersNumbers[i] == lotteryNumbers[j]) {
//match++;
break;
}
}
}
}
return match;
}
/**
* In addition, the class should have a method that returns a copy of the
* lotteryNumbers array.
*/
public int[] getLotteryNumbers() {
return lotteryNumbers;
}
}
/**
* Demonstrate the class in a program that asks the user to enter five numbers.
* The program should display the number of digits that match the randomly
* generate lottery numbers. If all of the digits match, display a message
* proclaiming the user a grand prize winner.
*/
public class LotteryApplication {
public static void main(String[] args) {
Lottery lottery = new Lottery();
int lotteryNumbersCount = lottery.getLotteryNumbers().length;
System.out.println("\t\t\t\tLottery Application\n");
System.out.println(" " + "There are " + lotteryNumbersCount
+ " secret numbers in range of 0 through 9. "
+ "Try to guess them!\n");
// Asks the user to enter five numbers.
Scanner kb = new Scanner(System.in);
int numbers[] = new int[lotteryNumbersCount];
for (int i = 0; i < numbers.length; i++) {
System.out.print(String.format("Enter Number %d: ", i + 1));
numbers[i] = kb.nextInt();
}
// Display the number of digits that match the randomly generate
// lottery numbers.
int match = lottery.compareNumbers(numbers);
if (match == lotteryNumbersCount) {
// If all of the digits match, display a message proclaiming the
// user a grand prize winner.
System.out.println("\nWOHOO! ALL CORRECT! YOU WON THE BIG PRIZE!");
} else {
System.out.println("\nUh-oh! You hit " + match + " number(s).");
}
}
}
import java.util.Random;
导入java.util.Scanner;
班级彩票{
/**
*彩票号码。
*/
私人国际彩票号码[];
/**
*默认构造函数。
*
*该类应使用随机类(来自JavaAPI)生成
*数组中每个元素的0到9范围内的随机数。
*/
公共彩票(){
Random rand=新的Random(System.currentTimeMillis());
乐透数字=新整数[5];
for(int i=0;i
将内部for循环从for(int j=0;j
更改为for(int j=0;j
,否则您将运行i++
太多次,并超出lotteryNumbers
在第二个for循环中的界限,同时计算i++
。所以在这两个for循环中都计算i++
。但是,您应该在另一个循环j++
中计数一次。可能是复制粘贴的结果
if (usersNumbers.length == lotteryNumbers.length) {
for (int i = 0; i < lotteryNumbers.length; i++) {
//Here you have to set j++
for(int j = 0; j < lotteryNumbers.length; j++) {
if (usersNumbers[i] == lotteryNumbers[j]) {
//match++;
break;
}
}
}
}
if(usersNumbers.length==lotteryNumbers.length){
for(int i=0;i
你在compareNumbers
方法中的j
循环中激励了i
。谢谢你,这起作用了。我不知怎么的,我不确定这是否与我的match++有关,这就是我将其注释掉的原因。不客气。如果我的答案对你有帮助,请点击我答案左侧的“勾号”接受我的答案。这样,其他人会更容易找到答案。当然,我希望我能投赞成票,但我需要15个代表lol,但没有勇气,谢谢你。@13lank\U null这没那么重要。谢谢你的回答。:)