Java動態建立陣列示範

/* Windows 10 作業系統電腦 */

package com.sample;

import static java.lang.System.out;
import java.util.Scanner;

public class TestArray2 {

    public static void main(String[] args) {

        int length = 0;
        int[] ptr = null;
        Scanner scanner = new Scanner(System.in);

        out.print("Please input array length : ");
        length = scanner.nextInt();
        ptr = new int[length];

        out.println("ptr = " + ptr);

        for (int i = 0; i < length; i++) {
            ptr[i] = (i + 1);
        }

        for (int i = 0; i < length; i++) {
            out.print(ptr[i] + ", ");
        }
        out.print("\n");

        ptr = null;
        scanner.close();
        scanner = null;
    }
}