point.comJava Array
The array is a collection of data that store the fixed number of values of the same type.
Syntax:-
datatype[] array_Name; or datatype array_Name[];
Example:
if we want to store marks of 100 students, then we can create an array for it.
float[] marks;
Size and type of arrays cannot change after it's declared.
Two types of Arrays:
- One-dimensional arrays
- Multidimensional(2D) arrays
| Array Type | Description |
|---|---|
| Single Dimensional array | In this we create and initialize all the values in the single array. |
| Multi-Dimensional Array | Java supports the multi-dimensional array. The multi-dimensional array also called as the Two-Dimensional array. |
Advantages of an array:
- It is better to store the data of the same data type with the same size.
- Coding is less, one variable can store a number of values.
- It allocates memory in different memory locations for its elements. There is no memory flow or shortage of memory in arrays.
- Iterating is faster in arrays compared to other methods like a linked list.
- By using array data retrieving is easy.
- Easily short the data using the swapping method.
- By array index, we can randomly access any element from the array.
- It supports multidimensional array.
Array Declaration in Java
To declare an array in Java programming language.
Syntax:-
dataType[] arrayReferencevariable = new dataType[arraySize];
Array Initialization in Java
An array is initialized by using the index of each element.
Syntax:-
int[] score = {100, 221, 59, 54};
Example:-
public class Array
{
public static void main(String []args) {
int[] score = {100, 221, 59, 54};
for(int i=0; i < score.length; i++)
{
System.out.println(" Element["+i+"]= "+score[i]);
}
}
}
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