Practice forEach, removeIf, replaceAll - 4.4.2 | 4. Java Collections Framework (Advanced | Advance Programming In Java
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4.4.2 - forEach, removeIf, replaceAll

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does the 'forEach' method do?

💡 Hint: Think about how we do operations on each item in a list.

Question 2

Easy

How does 'removeIf' work?

💡 Hint: It takes a predicate as an argument.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the purpose of the forEach method?

  • A) To remove elements from a collection
  • B) To apply an action for each element
  • C) To sort a collection

💡 Hint: Think about how you would express an operation on each item.

Question 2

True or False: The removeIf method removes elements based on a predicate.

  • True
  • False

💡 Hint: Recall the definition of removeIf.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Write a single Java method that accepts a List, removes specific unwanted entries based on a condition, and modifies the remaining entries to follow a specified format. Include use of forEach, removeIf, and replaceAll.

💡 Hint: Break down the task into separate method calls.

Question 2

How can you use functional programming concepts in Java to enhance data manipulation? Provide an example using these methods in a list context.

💡 Hint: Think about simplifying your code using lambdas.

Challenge and get performance evaluation