The “charAt()” method returns a character at a particular index whereas “indexOf()” method gives the first occurrence of a specified character/substring in a string.
Java
What is the Difference Between += and ++ in Java
The “+=” operator is used to increment the value in a custom manner based on the assigned value whereas the “++” operator increments the value by 1 in each case.
What is Map.Entry Interface in Java
The “Map.Entry” interface in Java is defined in the “java.util” package and comprises various methods to access the entry in the Map.
How to Increment a Java for Loop by 2
By default, a “for” loop in Java increments by “1” but it can be incremented or decremented by “2” with the help of the addition assignment operator “+=”.
How to Check if a String Contains Only Digits in Java
To check if a string comprises only digits, apply the “Character.isDigit()” method, the “charAt()” method, the “contains()” method, or the “Regular Expression”.
How to Check if a String Contains a Substring in Java
For checking if a string contains a target substring in Java, implement the “contains()” method or the “indexOf()” method.
Enhanced for Loop in Java
The enhanced for loop, also known as the “for-each” loop, is a functionality that iterates through each of the values without using a function or a method.
How to Use Stream peek() Method in Java
Stream “peek()” method returns a Stream comprising the elements of the current stream and returns nothing if applied without a terminal operation.