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Asked: 2023-05-27T09:30:08+00:00 In:

Java Program to Find the Address of an Array

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Java Program to Find the Address of an Array
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    1. This is the Java Program to Find Address of an Array Element Given the Base Address.

      Problem Description

      Given the base address of an array, and the element size. Find out the address of the given element.

      Example:
      Base address = 2400
      Element Size = 5
      Element index = 6

      Output:
      Element address = 2430

      Problem Solution

      The address of an array element at index i, and the base address b, with a given element size s, is calculated using the formula

      Element address = b + i*s.

       

      Program/Source Code

      Here is the source code of the Java Program to Find Address of an Array Element Given the Base Address. The program is successfully compiled and tested using IDE IntelliJ Idea in Windows 7. The program output is also shown below.

      2. // Java Program to Find Address of an Array Element Given the Base Address.
      4. import java.io.BufferedReader;
      5. import java.io.IOException;
      6. import java.io.InputStreamReader;
      8. public class ArrayElementAddress {
      9.     // Function to read input and display the output
      10.     public static void main(String args[])throws IOException
      11.     {
      12.         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
      13.         long size_of_element,base_address,index;
      14.         System.out.println("Enter the base address of the array(>=0)");
      15.         try{
      16.             base_address=Long.parseLong(br.readLine());
      17.         }
      18.         catch(Exception e){
      19.             System.out.println("Invalid Base Address");
      20.             return;
      21.         }
      22.         System.out.println("Enter the size of the array element in bytes(>0)");
      23.         try{
      24.             size_of_element=Long.parseLong(br.readLine());
      25.         }
      26.         catch(Exception e){
      27.             System.out.println("Invalid Size");
      28.             return;
      29.         }
      30.         System.out.println("Enter the index of the element(>=0)");
      31.         try{
      32.             index=Long.parseLong(br.readLine());
      33.         }
      34.         catch(Exception e){
      35.             System.out.println("Invalid Index");
      36.             return;
      37.         }
      38.         if( base_address < 0 || size_of_element <=0 || index < 0 ){
      39.             System.out.println("Invalid Input");
      40.         }
      41.         long element_Address;
      42.         element_Address = base_address + (size_of_element * index);
      43.         System.out.println("The address of the element at index "+ index
      44.                                                  +" is "+element_Address);
      45.     }
      46. }
      Program Explanation
      1. In main() function the base address, size of the element and the index of an element are entered.
      
2. The condition if( base_address < 0 || size_of_element <=0 || index < 0 ) checks if any of the three values is invalid.
      
3. If any one of the input is invalid, the program terminates after displaying a suitable message.
      
4. Otherwise, the statement element_Address = base_address + (size_of_element * index); calculates the address of the element and it is displayed.
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