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Optional for Null Pointer

Deepika Sahu answered on December 29, 2022 Popularity 1/10 Helpfulness 1/10

answer Optional for Null Pointer

Optional for Null Pointer

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// Java program to handle NullPointerException
// using Optional Class
  
import java.util.Optional;
  
public class Example {
    public static void main(String[] args)
    {
  
        // Create a String of size 10
        String[] a = new String[10];
  
        // Define the a[1] element
        a[1] = "geeksforgeeks";
  
        // Create an Optional Class instance
        // and get the state for a[1] element
        // for Null value
        Optional<String> check = Optional.ofNullable(a[1]);
  
        // If the value in the current instance is null,
        // it will return false, else true
        if (check.isPresent()) {
  
            // The String is not empty
            // So a[1] will have a value at present
            String upcase = a[1].toUpperCase();
            System.out.print(upcase);
        }
        else
  
            // If the current value is null
            System.out.println("String value is not present");
    }
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: www.geeksforgeeks.org

Tags: java null-pointer

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