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Java Collection, LinkedList Exercises: Replace an element in a linked list

Java Collection, LinkedList Exercises: Exercise-26 with Solution

Write a Java program to replace an element in a linked list.

Sample Solution:-

Java Code:

import java.util.LinkedList;
import java.util.Collections;
  public class Exercise18 {
  public static void main(String[] args) {
          LinkedList<String> c1= new LinkedList<String>();
          c1.add("Red");
          c1.add("Green");
          c1.add("Black");
          c1.add("White");
          c1.add("Pink");
          System.out.println("Original linked list: " + c1);
          // Replacing 2nd element with new value
          c1.set(1, "Orange");
          System.out.println("The value of second element changed.");
          System.out.println("New linked list: " + c1);
   }
}

Sample Output:

Original linked list: [Red, Green, Black, White, Pink]                 
The value of second element changed.                                   
New linked list: [Red, Orange, Black, White, Pink]

Pictorial Presentation:

Java Collection Linked-list: Replace an element in a linked list.

Flowchart:

Flowchart: Replace an element in a linked list

Java Code Editor:

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Java: Tips of the Day

Try and catch:

Java is excellent at catching errors, but it can only recover gracefully if you tell it what to do. The cascading hierarchy of attempting to perform an action in Java starts with try, falls back to catch, and ends with finally. Should the try clause fail, then catch is invoked, and in the end, there's always finally to perform some sensible action regardless of the results. Here's an example:

try {
        cmd = parser.parse(opt, args); 
       
        if(cmd.hasOption("help")) {
                HelpFormatter helper = new HelpFormatter();
                helper.printHelp("Hello ", opt);
                System.exit(0);
                }
        else {
                if(cmd.hasOption("shell") || cmd.hasOption("s")) {
                String target = cmd.getOptionValue("tgt");
                } // else
        } // fi
} catch (ParseException err) {
        System.out.println(err);
        System.exit(1);
        } //catch
        finally {
                new Hello().helloWorld(opt);
        } //finally
} //try

It's a robust system that attempts to avoid irrecoverable errors or, at least, to provide you with the option to give useful feedback to the user. Use it often, and your users will thank you!

Ref: https://red.ht/3EZc9OC