如何動態宣告 Java 陣列。
要動態宣告陣列大小,請使用 Scanner 類從使用者讀取所需的整數值,並使用給定值建立一個數組
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));
}
}輸出
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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