How to Determine the Size of a String Array in Java?

How can I determine the size of a String array in Java, similar to PHP's array_size() function?

In Java, unlike PHP's `array_size()` function, arrays have a built-in property that allows you to easily determine their size. This property can be accessed directly without needing any additional methods or functions.

String[] fruits = new String[5];
int size = fruits.length; // size will be 5

// Example of filling the array
fruits[0] = "Apple";
fruits[1] = "Banana";

// Getting current utilization
int currentSize = 0;
for (String fruit : fruits) {
    if (fruit != null) {
        currentSize++;
    }
}  
// currentSize will be 2

Causes

• Understanding the difference between PHP arrays and Java arrays is crucial for transitioning between the two languages.
• PHP arrays are flexible and can be resized, while Java arrays have a fixed length that is defined upon creation.

Solutions

• You can check the size of a String array in Java using the `.length` property of the array.
• Example: `String[] fruits = new String[5]; int size = fruits.length;` This will give you the number of elements that the array can hold.

Mistake: Attempting to use a method like `size()` on a Java array (i.e., `fruits.size()`).

Solution: Remember, Java arrays do not have methods like lists or collections; use `.length` property instead.

Mistake: Not checking for null elements when trying to count the 'used' elements in the array.

Solution: Implement a loop to check for non-null values before counting.