Flash cards
Review the key moves
1/4
Core idea
What is the main idea behind Java How To Reverse a String?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
1Quick choice
Which statement best captures the main point of this lesson?
2Fill blank
Complete the missing token from the example code.
___ originalStr = "Hello";Reverse a String
You can easily reverse a string by characters with the following example:
Example
String originalStr = "Hello";
String reversedStr = "";
for (int i = 0; i < originalStr.length(); i++) {
reversedStr = originalStr.charAt(i) + reversedStr;
}
System.out.println("Reversed string: "+ reversedStr);Explanation: We start with an empty string reversedStr . - On each loop, we take one character from the original string using charAt() . - Instead of adding it to the end, we place it in front of the existing reversedStr . - This way, the characters are built in reverse order. For example, from "Hello" we get "olleH" .
Related Pages
Java String Methods