如何确定Java中数组的长度或大小()

数组没有可用的size()方法。但是有一个长度数组中可用的字段, 可用于查找数组的长度或大小。
array.length:length是适用于数组的最终变量。借助length变量, 我们可以获得数组的大小。
例子:

int size = arr[].length; //length can be used //for int[], double[], String[] //to know the length of the arrays.

下面是如何使用length变量获取Java中array []的长度的说明:
示例1:
//Java program to illustrate //how to get the length of the arraypublic class Test { public static void main(String[] args) {//Here array is the //array name of int type int [] array = new int [ 4 ]; System.out.println( "The size of " + "the array is " + array.length); } }

输出如下:
The size of the array is 4

示例2:
//Java program to illustrate //how to get the length of the arraypublic class Test { public static void main(String[] args) {//Here str is the array name //of String type. String[] str = { "GEEKS" , "FOR" , "GEEKS" }; System.out.println( "The size of " + "the array is " + str.length); } }

【如何确定Java中数组的长度或大小()】输出如下:
The size of the array is 3

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