JAVA

how to declare array java

int intArray[];    //declaring array
intArray = new int[20];  // allocating memory to array
//OR
int[] intArray = new int[20]; // combining both statements in one

java array declaration

int[] array = new int[/*size*/];
// Works for double, char, etc.

how to create an array in java

int[] array1 = new int[5]; //int array length 5
String[] array2 = new String[5] //String array length 5
double[] array3 = new double[5] // Double array length 5

how to declare an array in java

An array is an ordered collection of elements of the same type, identified by a pair of square brackets []. 
 
 To use an array, you need to:
1. Declare the array with a name and a type. Use a plural name for array, e.g., marks, rows, numbers. All elements of the array belong to the same type.
2. Allocate the array using new operator, or through initialization, e.g.
  
  int[] marks;  // Declare an int array named marks
              // marks contains a special value called null.
int marks[];  // Same as above, but the above syntax recommended
marks = new int[5];   // Allocate 5 elements via the "new" operator
// Declare and allocate a 20-element array in one statement via "new" operator
int[] factors = new int[20];
// Declare, allocate a 6-element array thru initialization
int[] numbers = {11, 22, 33, 44, 55, 66}; // size of array deduced from the number of items

array declaration in java syntax

Syntax:
data type [] varible name=new  datatype[size]{paramters};

Declaration of an array in java

//1-dimensional array 10
int array[] = new  int[10];

//2-dimensional array 10x5
int array[][]= new  int[10][5]; //

/* 
   |  Or it can also be declared by setting some values          |
   |  The dimensions of the array will be obtained 			     |
   |  automatically by the compiler according to the declaration | 
*/
int array[] = {1,2,3,4,5,6}; //---> new array[6] 
	//--- the value of array[0] is 1
	// |  the value of array[1] is 2
	// ...
	//--- the value of array[5] is 6
int array[][] = { {1,2,3,4},{5,6,7,8},{9,10,11,12} }; //---> array[3][4]

declaration and definition of array in java

int[] marks = new int[5];
marks = { 91,92,93,94,95}