How do you assign an object to an array?

How do you assign an object to an array?

One way to initialize the array of objects is by using the constructors. When you create actual objects, you can assign initial values to each of the objects by passing values to the constructor. You can also have a separate member method in a class that will assign data to the objects.

How do you assign a value to an array of objects in Java?

Java Arrays of Objects

1. Declaration. int[] arr; // declares a variable arr with a type of int array.
2. Instantiation. arr = new int[5]; // create an array of 5 integers.
3. All at Once. int[] arr = new int[5];
4. Set/Get. arr[2]= 4; int x = arr[4];

How to use array as an instance variable in Java?

Closed 8 years ago. I have an array (moduleList) as one of my four private instance variables within my class CourseYear. I want to be able to add the names of the objects of the array within a different class CourseYearTestApplication. so far for the CourseYear class I have:

How to assign value to an array object in Java?

So all 10 elements of the array are null. You need to create the objects and stick them into the array. For example: Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers.

Why do I get a NullPointerException when assigning value to an array?

I am attempting to assign a value to an array object like this: I am getting a NullPointerException and am not sure why. What could be causing this? This is because creating a new array does not create individual objects inside the array; you should be creating them separately, e.g. in a loop.

How to set a string in an array?

What strings do you want to set? if it’s the course year etc, then courseYear1.setTutor (“John”); is fine. But if you mean setting things in the array, you should use the access method, so courseYear1.getModule (1).setSomething (“this String”); If it’s something else you might need to be a bit clearer.