Become an intermediate level Java developer, ready to take on your own projects.

Become a Spring Boot Developer

Learn Java for free with this interactive module, and get a handle on one of the most popular programming languages in the world.

You'll start with a simple hello world program and proceed to cover common concepts such as conditional statements, loop statements, math, and logic in Java, before moving on to more advanced concepts like inheritance, generics, and ArrayLists, along with much more.

Core Java Concepts

# Problem statement

Given a `Character` ArrayList, you have to implement a Java method to remove all the _duplicate elements_ from it.

## Function prototype
```java
void removeDuplicates(ArrayList<Character> arrList)
```
## Output
An ArrayList with all the unique elements.
## Sample input
```java
arrList = [a,b,b,c,c,c,d]
```

## Sample output
```java
arrList = [a,b,c,d]
```


In this challenge, you'll have to code for removing the duplicates from an ArrayList.

Before We Begin

Getting Started with Java!

Variable and User Input

Simple Maths & Logic

Strings and String Processing

Conditional Statements

Loops

Methods

Arrays

Classes and Inheritance

Generics

ArrayLists

Java Exam

Conclusion

Challenge 2: Remove Duplicates From an ArrayList

Problem statement #