Java 程序查找数组中的元素数量

编写一个 Java 程序,通过示例查找数组中的元素数量。例如,我们可以使用数组的 length 属性来查找并打印元素的总数。

package NumPrograms;

public class ArrayCountElements1 {
	
	public static void main(String[] args) {
		
		int[] arr = new int[] {10, 20, 30, 40, 50, 60};
		
		int count = arr.length;
		
		System.out.println("The Total Number of Elemenst in an Array = " + count);
	}
}
Java Program to Find the Number of Elements in an Array

此程序使用 for 循环查找数组中的元素数量。

package NumPrograms;

public class Example2 {
	
	public static void main(String[] args) {
		
		int[] arr = new int[] {22, 99, 8, 17, 6, 11, 1, 15, 2, 5, 4};
		
		int count = 0;
		
		for(int i : arr)
		{
			count++;
		}
		
		System.out.println("The Total Number = " + count);
	}
}
The Total Number = 11

在此 示例 中,我们使用了 while 循环来迭代数组项,并添加了条件来检查元素是否等于字符 x。 

package NumPrograms;

public class Example3 {
	
	public static void main(String[] args) {
		
		int[] arr = new int[] {1, 9, 11, 4, 7, 22, 9, 17, 8};
		
		int count = 0;
		int i = 0;
		try 
		{
			while(arr[i] != 'x')
			{
				count++;
				i++;
			}
		}
		catch(Exception e)
		{	
			System.out.println("The Total Number of Items = " + count);
		}
	}
}
The Total Number of Items = 9