Java Array

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A fixed-size data structure in Java lets you store many values of the same data type in a single variable. Arrays hold groups of similar components like integers, floating-point numbers, letters, or objects. In Java, arrays are zero-indexed, which means that the first element is index 0, the second at index 1, and so on.

Declaring and Creating an Array

dataType[] arrayName; 
arrayName = new dataType[arraySize];
  • To declare an array define the variable type with the [].
  • We can declare the dataType and variable name and then create an array with its size.

You can also declare and build an array in a single line by using the following syntax:

String[] devilFruits = {"Gum-Gum Fruit","Mera Mera No Mi", "Haki"};
Int[] countScore = {"100","33","600"};

Access An Array

        String[] devilFruits = { "Gum-Gum Fruit", "Mera Mera No Mi", "Paramecia" };
  • Using the index of the array, we can access the content within it.

Change Array Element

        String[] devilFruits = { "Gum-Gum Fruit", "Mera Mera No Mi", "Paramecia" };
        devilFruits[1] = "Haki";
  • We can change an array element provided with the index and new content which should be within it.


        String[] devilFruits = { "Gum-Gum Fruit", "Mera Mera No Mi", "Paramecia" };

  • Using the length method, we can fetch the length of an array.
  • This will return 3.