Declaring an array
Syntax: One Dimensional Array Method 1 Type[] arrayReferenceName; //Recommended Method 2 Type arrayReferenceName[]; //Legal, but not recommended Syntax: Two Dimensional Array Method 1 Type[] [] [...]
Constructing an array
This step creates an actual array object on the heap memory with the specified size i.e.) number of elements this array will hold. Size must be a positive integer value. This is done using new [...]
Array length
All array objects have one built-in public variable to determine the length of an array. Syntax: arrayName.length
Initializing an array
One Dimensional Array Initializing an array means assigning values to the array elements. It can be either primitive values (12, 75.5, true, etc) or object reference (Animal, Person, String, etc) [...]
Declaring, creating and initializing in one line
This is the second method for declaring, creating and initializing an array object in one line. Primitive How this works? Declares a double array reference variable named studentAvgs; Creates a [...]
Anonymous Array Creation
This is the third method for declaring, creating and initializing an array object in one line. One Dimensional Array or, When you use this method size should not be specified. Person[] arr = new [...]
Traversing an array
Using Enhanced For-loop This is a specialized for loop introduced in Java SE 6 to loop through an array or collection. It has two parts for(declaration : expression) declaration newly declared [...]
Summary
Array Creation There are three ways of creating an array. Array Length Length/size of the array can be obtained using arrayReferenceName.length Illegal Array Declaration You should not specify [...]