为避免硬编码,您可以使用诸如Scanner之类的阅读器类的命令行参数从用户那里读取数组的大小。然后使用此值创建一个数组:
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]