How to use a method to reference a data type(array) that is created in a constructor

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Sorry for the bad title...but I currently have a class Array and its constructor with a simple method getSize(). The constructor creates the array, is there a way to reference this array in the method without having to pass it as a param?

//constructor
Array(int n) {
    int arr[] = new int[n];
}
//method
static int getSize(int index) {

    //how do I reference the created array?
    return index;

}

SOLVED! THANK YOU


You can not reference a local variable declared in another method.

Instead, you can make it an instance member and reference it in these two methods.

Also, getSize should not be static since you can not reference a non-static member in a static method.

private int arr[];

Array(int n) {
    arr[] = new int[n];
}

int getSize(int index) {
    //reference the array here
    return index;
}

How to pass Arrays to Methods in Java?, – it can contain arbitrary JavaScript statements, separated from each other by semicolons. As such, it will benefit the reader to see a basic example of a method reference, and through understanding this, understand what Constructor References are. “Method references provide easy-to


Why not declare the array as a class variable?

int arr[];

//constructor
Array(int n) {
    arr = new int[n];
}
//method
int getSize(int index) {

    //how do I reference the created array?
    return index;

}

JavaScript - The Function() Constructor, When a reference variable is passed as an argument to a method? Argument Types You can pass an argument of any data type into a method or a constructor. This includes primitive data types, such as doubles, floats, and integers, as you saw in the computePayment method, and reference data types, such as classes and arrays. Here's an example of a factory method that accepts an array as an argument.


You can access only the static variables in a static method. In order to access the array in this method either you have to make your array a static member but then you should initialize it in a static block.

Other thing which you can do is make the method non-static. Then you will be able to access the array inside the function without having to create an instance of the class.

Java: Passing a reference to a variable as an argument for a method , You can pass an argument of any data type into a method or a constructor. in the computePayment method, and reference data types, such as classes and arrays. This name is used within the method body to refer to the data. The changes made to the RGBColor object within the getRGBColor method persist after the  A constructor in Java is a block of code similar to a method that’s called when an instance of an object is created. Here are the key differences between a constructor and a method: A constructor doesn’t have a return type. The name of the constructor must be the same as the name of the class. Unlike methods,


Passing Information into a Method or a Constructor, A constructor reference is similar to method reference except that the name of a method is new. We can also create a constructor reference with an array type. For instance, if we need to create an integer array by using the constructor reference: int[]:: new, where the parameter is a length of an array. The constructor method is similar to any other public method except that it shares the same name as the class, and it cannot return a value. It can have none, one or many parameters. Currently, our constructor method does nothing at all, and it's a good time to consider what this means for the initial state of the Person object.


How to create a constructor reference for an array in Java?, The Array() constructor is used to create Array objects. References & Guides▽ arrayLength: If the only argument passed to the Array constructor is an integer between 0 and 232-1 (inclusive), this returns a new JavaScript array Update compatibility data on GitHub Inheritance: Function; Properties. A single variable of array type may contain references to arrays of different lengths, because an array's length is not part of its type. If an array variable v has type A [] , where A is a reference type, then v can hold a reference to an instance of any array type B [] , provided B can be assigned to A ( §5.2 ).


Array() constructor, The constructor property returns a reference to the Object constructor function that created the instance Objects created without the explicit use of a constructor function (such as object- and array-literals) will have a constructor property that points to the Fundamental Object constructor type for that object. Java-8 Method References Examples. Method Reference - Reference to a Static Method example. Method Reference - Reference to a Instance Method example. Method Reference - Reference to a Constructor example.