如何在不进行硬编码的情况下在Java中定义数组大小?
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:
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]
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