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0Basic array operation using java
Basic array operation using java
In array, we can perform the various operation.
So in this section, we learn about some basic operation that can be performed on the array.
so there is some following operation which we are applied on the array:
- Insertion in an array
- Deletion in the array
- Searching in the array
now we discuss these all above-mentioned operation.
for performing this operation we must have the knowledge to declare, create and initialise the array.
Insertion in the array
To insert any element in an array in java programming, you have to ask the user to enter the array size and array element. Now ask the user to enter the element and position where he/she want to insert that element at the desired position as shown in the following program.
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
int size,insert,poss;
//creation of the array
int[] arr = new int[50];
//declare scanner class
Scanner sc= new Scanner(System.in);
System.out.print("enter array size ");
size=sc.nextInt();
System.out.println("enter array elements");
for(int i=0;i<size;i++)
arr[i]=sc.nextInt();
System.out.println("the array before insertion");
for(int i=0;i<size;i++)
System.out.print(arr[i]+" ");
System.out.println();
System.out.print("enter element to be insert ");
insert=sc.nextInt();
System.out.print("enter the position ");
poss=sc.nextInt();
for(int i=size;i>poss-1;i--)
arr[i]=arr[i-1];
arr[poss-1]=insert;
System.out.println("element successfully inserted");
System.out.println("the array after insertion");
for(int i=0;i<=size;i++)
System.out.print(arr[i]+" ");
}
}
Output
enter array size 4
enter array elements
12
55
3
8
the array before insertion
12 55 3 8
enter element to be insert 2
enter the position 4
element successfully inserted
the array after insertion
12 55 3 2 8
Deletion in the array
To delete an element from an array in Java programming, you have to first ask the user to enter the size and elements of the array, now ask to enter the element/number which is to be deleted. Now to delete that element from the array first you have to search that element to check whether that number is present in the array or not if found then place the next element after the founded element to the back until the last as shown in the following program.
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
int size,delete,c=0;
int[] arr = new int[50];
//declare the scanner class
Scanner sc= new Scanner(System.in);
System.out.print("enter array size ");
size=sc.nextInt();
System.out.println("enter array elements");
for(int i=0;i<size;i++)
arr[i]=sc.nextInt();
System.out.println("the array before deletion");
for(int i=0;i<size;i++)
System.out.print(arr[i]+" ");
System.out.println();
System.out.print("enter element to be delete ");
delete=sc.nextInt();
for(int i=0;i<size;i++)
{
if(arr[i]==delete)
{
for(int j=i;j<size;j++)
arr[j]=arr[j+1];
c++;
break;
}
}
if(c==0)
{
System.out.print("Element Not Found");
}
else
{
System.out.println("element successfully deleted");
System.out.println("the array after deletion");
for(int i=0;i<size-1;i++)
System.out.print(arr[i]+" ");
}
}
}
Output
enter array size 4
enter array elements
12
44
2
6
the array before deletion
12 44 2 6
enter element to be delete 2
element successfully deleted
the array after deletion
12 44 6
Searching in the array
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
int size,search,c=0,pos=0;
int[] arr = new int[50];
Scanner sc= new Scanner(System.in);
System.out.print("enter array size ");
size=sc.nextInt();
System.out.println("enter array elements");
for(int i=0;i<size;i++)
arr[i]=sc.nextInt();
System.out.println("the array is");
for(int i=0;i<size;i++)
System.out.print(arr[i]+" ");
System.out.println();
System.out.print("enter element to be search ");
search=sc.nextInt();
for(int i=0;i<size;i++)
{
if(arr[i]==search)
{
c++;
pos=i+1;
break;
}
}
if(c==1)
System.out.println(search+" is found at the possition "+pos);
else
System.out.println("not found");
}
}
Output
enter array size 4
enter array elements
12
33
2
8
the array is
12 33 2 8
enter element to be search 2
2 is found at the possition 3
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