Java 程序打印数组中的第 K 个元素

编写一个 Java 程序，使用 for 循环打印数组中的第 K 个元素。

package NumPrograms;

import java.util.Scanner;

public class ArrayKthElement1 {
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);
		
		System.out.print("Please Enter the Array size = ");
		int Size = sc.nextInt();
		
		int[] arr = new int[Size];
		
		System.out.format("Enter the Array %d elements : ", Size);
		for(int i = 0; i < Size; i++) 
		{
			arr[i] = sc.nextInt();
		}
		
		System.out.print("Enter Kth Position to Check Array Number = ");
		int k = sc.nextInt();
		
		System.out.println("Number at " + k + " Position = " + arr[k - 1]);
	}
}

此程序使用 while 循环打印给定数组中的第 K 个元素。在此 Java 示例中，我们使用了一个额外的 if else 语句来检查该值是否在数组范围内。

package NumPrograms;

import java.util.Scanner;

public class Example2 {
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);
		
		System.out.print("Please Enter the size = ");
		int Size = sc.nextInt();
		
		int[] arr = new int[Size];
		
		System.out.format("Enter the %d elements : ", Size);
		int i = 0; 
		while(i < Size) 
		{
			arr[i] = sc.nextInt();
			i++;
		}
		
		System.out.print("Enter Kth Position to Check Array Number = ");
		int k = sc.nextInt();
		
		if(k <= Size)
		{
			System.out.println("Number at " + k + " Position = " + arr[k - 1]);
		}
		else
		{
			System.out.println("The Kth Position is Out of Range");
		}
	}
}

Please Enter the size = 8
Enter the 8 elements : 10 20 30 40 50 60 70 80
Enter Kth Position to Check Array Number = 6
Number at 6 Position = 60