In Java, methods or functions are used to divide a program into smaller modules. These methods are called from other functions, and data is provided to and from these methods to the calling functions while they are being called.
Arguments or parameters to the called function are the data supplied from the calling function to the called function. The return value is the data delivered by the function.
All primitive and derived types may be supplied to and returned from the function in most cases. Arrays may be supplied to the method and returned from it in the same way.
When sending an array to a method, the method receives the array’s reference.
The array reference is returned when a method returns an array.
Arrays are provided to methods in the same way that regular variables are.
When we send an array as a parameter to a method, we are actually passing the memory location of the array (reference).
As a result, any modifications made to this array in the function will have an impact on the array.
The array of the proper data type should be defined as the data type that returns value. A reference to the array is returned as a value from a method.
A method may return an array reference. A method’s return type must be stated as an array of the appropriate data type.
There are two approaches for getting to the same array:
Access the array using an array type instance variable, or.
As a parameter, provide the array to methods.
The sole purpose to send an array by reference is so that the pointer may be changed to point to a different array. You normally signal that a function simply looks at the contents of an array and does not modify what is in the array by adding const to the argument.
Arrays are full-fledged objects in Java, and they are produced dynamically, just like any other object in a Java application. Array references may be used whenever an Object reference is required, and any Object function can be used on an array.
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