Java Collection, LinkedList Exercises: Check if a particular element exists in a linked list
Java Collection, LinkedList Exercises: Exercise-22 with Solution
Write a Java program to check if a particular element exists in a linked list.
Sample Solution:-
Java Code:
import java.util.*;
public class Exercise22 {
public static void main(String[] args) {
// create an empty linked list
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);
// Checks whether the color "Green" exists or not.
if (c1.contains("Green")) {
System.out.println("Color Green is present in the linked list.");
} else {
System.out.println("Color Green is not present in the linked list.");
}
// Checks whether the color "Orange" exists or not.
if (c1.contains("Orange")) {
System.out.println("Color Orange is present in the linked list.");
} else {
System.out.println("Color Orange is not present in the linked list.");
}
}
}
Sample Output:
Original linked list: [Red, Green, Black, White, Pink] Color Green is present in the linked list. Color Orange is not present in the linked list.
Pictorial Presentation:
Flowchart:

Java Code Editor:
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Java: Tips of the Day
getEnumMap
Converts to enum to Map where key is the name and value is Enum itself.
public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) { return Arrays.stream(enumClass.getEnumConstants()) .collect(Collectors.toMap(Enum::name, Function.identity())); }
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