declare int array in java code example

Example 1: creating array java

int[] intArray = new int[]{ 1,2,3,4,5,6,7,8,9,10 }

Example 2: java array declaration

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

Example 3: Declare, instantiate, initialize and use a one-dimensional array

data = new Double[10];

Example 4: 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

Example 5: declare array with values java

int[] myIntArray = new int[3];
int[] myIntArray = {1, 2, 3};
int[] myIntArray = new int[]{1, 2, 3};

Example 6: set array length java

int[] num = new int[5];