Course Content

Java Extended

1. Deep Java Structure

How does the compiler works?Data transfer in Java Final Keyword Importing Libraries Using Libraries In Our Code Ternary Operator Enhanced Switch Statement

2. Methods

What is a Method?Creating Our Own Methods Challenge: Names Starting with Letter B Void Methods Practice Method Overloading Recursion Sorting Even Numbers Challenge

3. String Advanced

Deeper into String Method split()Uppercase Even Words Challenge indexOf() method Character Indices Sum Challenge trim() Method Substring First and Last Characters Challenge

4. Classes

What is class?Main Class and Method Access modifiers Class Creation Cat Meowing Challenge Constructor Team Constructor Challenge Method toString()Parrot Information Display Challenge

5. Classes Advanced

Complex Classes Usage Pet and Owner Relationship Challenge Private Modifier Animal Information Display Challenge Getter and Setter Country Information Management Challenge Summary

Java Extended

trim() Method

How can we get rid of extra space characters?

Sometimes a string may have leading or trailing spaces, which can cause issues in our code. However, Java developers have provided a solution for this by introducing the trim() method. What does it do? This method removes leading and trailing spaces from a string. If there are no leading or trailing spaces, the trim() method simply returns the original string. If the entire string consists of spaces, the trim() method will return an empty string.

Let's take a look at an example:

Main.java

That's essentially all we can say about this method. However, the trim() method does a lot of good and significantly simplifies working with strings.

1. What will be the output of the code from below?

2. What will be the output of the code from below?

3. What will be the output of the code from below?

4. What will be the output of the code from below?

What will be the output of the code from below?

Select the correct answer

What will be the output of the code from below?

Select the correct answer

What will be the output of the code from below?

Select the correct answer

What will be the output of the code from below?

Select the correct answer

"Hello World"

" Hello World "

"Hello World "

Everything was clear?

Section 3. Chapter 6

Course Content

Java Extended

1. Deep Java Structure

How does the compiler works?Data transfer in Java Final Keyword Importing Libraries Using Libraries In Our Code Ternary Operator Enhanced Switch Statement

2. Methods

What is a Method?Creating Our Own Methods Challenge: Names Starting with Letter B Void Methods Practice Method Overloading Recursion Sorting Even Numbers Challenge

3. String Advanced

Deeper into String Method split()Uppercase Even Words Challenge indexOf() method Character Indices Sum Challenge trim() Method Substring First and Last Characters Challenge

4. Classes

What is class?Main Class and Method Access modifiers Class Creation Cat Meowing Challenge Constructor Team Constructor Challenge Method toString()Parrot Information Display Challenge

5. Classes Advanced

Complex Classes Usage Pet and Owner Relationship Challenge Private Modifier Animal Information Display Challenge Getter and Setter Country Information Management Challenge Summary

Java Extended

trim() Method

How can we get rid of extra space characters?

Let's take a look at an example:

Main.java

That's essentially all we can say about this method. However, the trim() method does a lot of good and significantly simplifies working with strings.

1. What will be the output of the code from below?

2. What will be the output of the code from below?

3. What will be the output of the code from below?

4. What will be the output of the code from below?

What will be the output of the code from below?

Select the correct answer

What will be the output of the code from below?

Select the correct answer

What will be the output of the code from below?

Select the correct answer

What will be the output of the code from below?

Select the correct answer

"Hello World"

" Hello World "

"Hello World "

Everything was clear?

Section 3. Chapter 6