Arrays use in Java
Define Single Multi Dimensional Array types
Array is
also a data type which store more than one value in single variable, when you
want to create single variable with more than one values then array is a best
for that purpose. In java array is an object which contain elements of similar
type. In java array store a value on index based, first index starts from zero
(0).types of array
Types of array in java
In java
there are two types of array
o
Single dimensional array
o
Multi-dimensional array
Single
Dimensional Array
o Declaration:datatype[] arrayName; or
o Declaration:datatype []arrayName; or
o Declaration:datatype arrayName[];
o Initialization: arrayName = new datatype[size];
o Declaration and Initialization: datatype[] arrayName =
new datatype[size];
types of array
Now as you
notice in above example I used two array. First array I just declare and
initialize then individual I assigned values and in Second array I declare,
initialize and also assigned the value at a time. Now as I mention loops
section that I will discuss for each loop in later. In above I used for each
loop. For each loop is special for an array so that’s why it also called array
loop.types of array
1 .
Syntax of for each
loop
for (datatype name : array
of same datatype){
// body of for loop
}
For, foreach
you have to use same data types which array have, if your array is an integer
type then in for each loop you must declare integer datatype variable.types of array
2.
Multi-Dimensional
Array
o
Declaration:datatype[][]
arrayname;
o
Declaration:
datatype [][]arrayname;
o
Declaration:
datatype arrayname[][];
o
Initialization:arrayname
= new datatype[size][size];
o
Declaration and
Initialization:datatype[][] arrayname = new datatype[size][size];
o
First bracket show rows and
second bracket show columns
types of array
types of array - Define Single Multi Dimensional Array
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