Arrays in java

Arrays in java

  February 14, 2018    Unknown

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Arrays: - 
    Arrays are linear data Structure. Used to Store Similar Type Of elements/ values in continuous memory location.                                                                                                                                  Array is index based, first element of the array is stored at 0 index.                                                                                                          

Types of Array: -

1:- Single dimensional Array

2:- Multidimensional Array

Syntax of Single Dimensional Array :- 

DataType   Ref.Var [ ]  = new DataType[Size]  

Example:- 

1:-

public class EX1 {

public static void main(String[] args) {

   int arr []= new int [3];

  int arr [0]=5;

  int arr [1]=6;

  int arr [2]=8;

System.out.println(arr[0]+” ”+arr[1]+” “+arr[2]);

}

  }

2:-

public class AR2 {

public static void main(String[] args) {

   int arr []= {1,2,5,6,8};

   for (int i=0;i<arr.length;i++){

   System.out.println(arr[i]);

 }   

   }

  }

 Syntax of MultiDimensional Array :- 

 DataType   Ref.Var [ ] [ ]  = new DataType [Size]   [Size] 

Example:-

  import java.util.Scanner;

  public class AR2 {

  public static void main(String[] args) {

   Scanner na = new Scanner(System.in);

  System.out.println("Enter Element:- ")

     int arr [] [] = new int [3][3];

   for (int i=0;i<3;i++){

       for (int j=0;j<3;j++){

          arr[i][j]=na.nextInt();

       }

   }

   for (int i=0;i<3;i++){

       for (int j=0;j<3;j++){

          System.out.print(arr[i][j]+"\t");

       }

       System.out.println( );

   } 

  } 

  }