如何动态声明具有数组大小的Java数组?
要声明数组大小,请使用Scanner类从用户动态读取所需的整数值,并使用给定的值创建一个数组:
示例
import java.util.Arrays; import java.util.Scanner; public class PopulatingAnArray { public static void main(String args[]) { System.out.println("Enter the required size of the array :: "); Scanner s = new Scanner(System.in); int size = s.nextInt(); int myArray[] = new int [size]; System.out.println("Enter the elements of the array one by one "); for(int i = 0; i<size; i++) { myArray[i] = s.nextInt(); } System.out.println("Contents of the array are: "+Arrays.toString(myArray)); } }
输出结果
Enter the required size of the array :: 5 Enter the elements of the array one by one 78 96 45 23 45 Contents of the array are: [78, 96, 45, 23, 45]