在Java中添加到數組和陣列中

Question

我需要幫助瞭解如何讓用戶輸入不超過10的整數，然後將它們添加到數組中並從數組中打印出來。下面的代碼在運行時詢問用戶整數，然後永遠運行並且不起作用。我究竟做錯了什麼？

public static void main(String[] args) { 

    Scanner input = new Scanner(System.in); // create a new scanner 
    System.out.print("Enter integers between 1 and 100\n "); 
    int[] nextNumber = new int[10]; 
    int i = 0; 
    int number = input.nextInt(); 

    while (i < nextNumber.length){ 
     i++; 
     nextNumber[i] = number; 
     number = input.nextInt();  
    } 

    int a = 0; 

    while (a < nextNumber.length){ 
     a++; 
     System.out.println(nextNumber[a]); 
    } 

Answer 1

似乎對我來說，就像你太快地增加你的索引一樣。您應該在您的循環的端增加您的索引變量，而不是開始。

我會建議你使用for循環，而不是因爲它們被設計爲：

Scanner input = new Scanner(System.in); // create a new scanner 
System.out.print("Enter integers between 1 and 100\n "); 

int[] nextNumber = new int[10]; 

for (int i = 0; i < nextNumber.length; i++){ 
    nextNumber[i] = input.nextInt(); 
} 

for (int a = 0; a < nextNumber.length; a++){ 
    System.out.println(nextNumber[1]); 
} 

而且，雖然我沒有在代碼中改變它，它看起來像你的最後一行應該是：

System.out.println(nextNumber[a]); 

Answer 2

問題1

變化

int i = 0; 
int number = input.nextInt(); 
while (i < nextNumber.length){ 
i++; //here is one problem. you not assigning the value to nextNumber[0]. 
nextNumber[i] = number; 
number = input.nextInt(); 

} 

到

int i = 0; 
while (i < nextNumber.length){ 
    number = input.nextInt(); 
    nextNumber[i] = number; 
    i++; 
} 

問題2

變化

int a = 0; 
while (a < nextNumber.length){ 
    a++; //here is one problem ..You never get nextNumber[0] value 
System.out.println(nextNumber[a]); 

} 

到

int a = 0; 
while (a < nextNumber.length){ 
    System.out.println(nextNumber[a]); 
    a++; 
} 

Answer 3

增量的值後的數組索引已經被分配給陣列

while (i < nextNumber.length) { 
    number = input.nextInt(); 
    nextNumber[i] = number; 
    i++; 
} 

同applys到第二回路

while (a < nextNumber.length) { 
    System.out.println(nextNumber[a]); 
    a++; 
} 

Answer 4

您可以輕鬆地做到這一點如下。因爲您知道最大迭代次數，所以更好地使用循環。

Scanner input = new Scanner(System.in); // create a new scanner 
System.out.print("Enter integers between 1 and 100\n "); 
int[] nextNumber = new int[10]; 

int i = 0; 
while (i < nextNumber.length) nextNumber[i++] = input.nextInt(); 


int a = 0; 
while (a < nextNumber.length) System.out.println(nextNumber[a++]);