in your constructor you are creating another int array: public Date(){ int[] data = {0,0,0}; } Try this: data = {0,0,0}; NOTE: By the way you do NOT need to initialize your array elements if it is declared as an instance variable.

Feb 2, 2024 · The Arrays.setAll() method empowers Java developers to initialize arrays within constructors with a dynamic, index-dependent approach. This method is particularly useful when the array elements need to be calculated based on a specific formula or logic.

Apr 14, 2025 · In this article, we will discuss different ways to declare and initialize an array in Java. Understanding how to declare an array in Java is very important. In Java, an array is declared by specifying its data type, and an identifier, and adding brackets [] …

Dec 16, 2024 · In this article, we explored different ways of initializing arrays in Java. Also, we learned how to declare and allocate memory to arrays of any type, including one-dimensional and multi-dimensional arrays.

To initialize an int array in a constructor in Java, you can use an initializer list as follows: private int [] arr; public MyClass(int size) { arr = new int [size]; This creates an int array with the specified size and assigns it to the arr field. You can also use an …

Java Constructors. A constructor in Java is a special method that is used to initialize objects. The constructor is called when an object of a class is created. It can be used to set initial values for object attributes:

You can instantiate a new array in the constructor for that size and live with it. A good programming practice would be to create a final variable for the array size and use it to create the array. However, if you wish to create a resizeable array, …

How can I initialize an int array correctly in a Java class constructor? In Java, initializing arrays inside constructors needs to be done carefully, especially to avoid variable shadowing or hiding issues. This guide explains the correct method of array initialization. private int [] data = new int [3]; public Date() {

Java provides various constructors for initializing arrays. This section will discuss the three main types of array constructors: the default constructor, the specifying array size constructor, and the initializing arrays with values constructor.

Jul 21, 2023 · Java library classes extensively use constructors to initialize their objects with the desired initial state. For example, the ArrayList class provides multiple constructors to create an array list object with different initial capacities.