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

arrays in java

int[] intArray = new int[20];
String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};

java array

String[] array = new String[100];

java array

String[] animals ={"Dog", "Cat", "Fish", "Turtle", "Penguin"}; // Array of animals

array in java

int[] storer = {10,85,62};
System.out.println(storer[0]);

how to use arrays java

// How to use arrays 
// Julian
 public static void main(String[] args)
   {
   // Initialize array
      int[] arrNum = {25, 23, 15, 20, 24};
   // Recorrerlo
      for(int a = 0; a < arrNum.length; a++)
      {
         System.out.println(arrNum[a]);
      }
   }

array in java

String[] animals ={"Dog", "Cat", "Fish", "Turtle", "Penguin"};

java array

int[] anas = new int[3];
        age[0] = 1;
        age[1] = 3;
        age[2] = 6;

array 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]

Java how to create an array

String[] array = new String[] { "String1", "String2", "String3" }; // Create array
String string3 = array[2]; // Get array

java array

class Weight
{
  . . .
  
  public int average()
  {
    . . . 
  }
}

public class WeightTester
{  
  public static void main ( String[] args )
  {
    int[] values = { 98,  99,  98,  99, 100, 101, 102, 100, 104, 105,
                    105, 106, 105, 103, 104, 103, 105, 106, 107, 106,
                    105, 105, 104, 104, 103, 102, 102, 101, 100, 102};
                    
    Weight june = new Weight( values );
    int avg = june.average();
    System.out.println("average = " + avg );
  }
}

java how to create an array

int[] arr = new int[<size of the array>];

java array

// n is the legth of the array
int[] IntArray = new int[n] // int array
  
String[] StrArray = new String[n] // String array

Array Java

String[] fruits = {"apple", "orange", "pear"};
int[] num = {1, 2, 3, 4};

array java

// Declaration for a single int variable
int score;
// Declaration for an array of ints
int[] scores;

array in java

Java array is an object which contains elements of a similar data type.
Additionally, The elements of an array are stored in a contiguous memory
location.
 
Basically, it is one of the a data structure where we store similar elements. 
We can store only a fixed set of elements in a Java array.
  
following shows the use of the array in java,
int a[]=new int[5];//declaration and instantiation  
a[0]=10;//initialization  
a[1]=20;

//after printing array
default value of arrray element is 0;
[10,20,0,0,0]

array in java

Size is fixed
It supports both primitives and objects
Can be also multi-dimensional

array in java

// datatype var = new datatype[size]

int[] arr = new int[10];
// OR
int arr[] = new int[10];

Java array

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
System.out.println(cars[0]);

// Change elements in array
cars[0] = "Opel";
System.out.println(cars[0]);

// Length of array
System.out.println(cars.length);

// Loop through array
for (int i = 0; i < cars.length; i++) {
  System.out.println(cars[i]);
}

array in java

//Metodo 1
type nome = new type[n];

//Metodo 2
type nome[];
nome = new type[n];

arrays in java

int[][] numbers = { { 2, 5, 6 }, { 10, 76, 52 } };

java array

// 10 Strings in the array named: arr
String[] arr = new String[10];

java array

class Weight
{
  . . .
  
  public int average()
  {
    . . . 
  }
}

public class WeightTester
{  
  public static void main ( String[] args )
  {
    int[] values = { 98,  99,  98,  99, 100, 101, 102, 100, 104, 105,
                    105, 106, 105, 103, 104, 103, 105, 106, 107, 106,
                    105, 105, 104, 104, 103, 102, 102, 101, 100, 102};
                    
    Weight june = new Weight( values );
    int avg = june.average();
    System.out.println("average = " + avg );
  }
}