如何輸入數組長度？

Question

我試圖用.length輸入數組的長度，但弄錯了。 什麼是錯的？

import java.util.*; 
public class Storage { 
public static int i = 0, size; 
static int[] number; 

public static void main (String[] args) { 
    Scanner input = new Scanner(System.in); 
    System.out.println("What is the value of array?"); 
    number = new int [input.nextInt()]; 
    System.out.println("Write the numbers:"); 

    for (int i : number) { 
     number[i] = input.nextInt(); 
    } 
    System.out.println("Array:"); 
    System.out.println(Arrays.toString(number)); 
} 

} 

，輸出是：

What is the value of array? 
3 
Write the numbers: 

1 
2 
3 
Array: 
[3, 0, 0] 

Answer 1

你是不是增加索引，所以存儲所有值，您在第0 index.Try由此進入：

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

    System.out.println("Array:"); 

    for (int j : number) { 
     System.out.println(j); 
    } 

輸出：

What is the value of array? 
3 
Write the numbers: 
1 
2 
3 
Array: 
1 
2 
3 

Answer 2

的foreach用於在收集讀數值。

改爲使用它。

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