Programming Step by Step

The Java ExecutorService is an interface that provides a way to execute tasks asynchronously. It is part of the java.util.concurrent package...

ChatGPT is a large language model chatbot developed by OpenAI. It is trained on a massive dataset of text and code and can generate text, tr...

H ere is an example of how to use an enum in a switch statement in Java: public enum Color { RED, GREEN, BLUE; } public class Co...

The enum keyword in Java is used to create a special type of class that can only contain a finite set of values. These values are called enu...

There are several ways to check if an element exists in an ArrayList in a case-insensitive way in Java. Using  String.equalsIgnoreCase() The...

There are several ways to convert a Java HashMap to a JSON string. Here are two of the most common methods: Using Gson Gson is a popular Jav...

To convert a Java date string to a date format, you can use the following steps: Create a  SimpleDateFormat  object with the desired date fo...

There are several ways to convert an ArrayList to a JSON string in Java. Here are two of the most common methods: Using Gson Gson is a popul...

There are several ways to convert an array to an ArrayList in Java. Here are three of the most common methods: Using Arrays.asList() The Arr...

Question) Why Should an Object Used As the Key should be Immutable?   This is another follow-up to the previous core Java interview questio...

BASIC JAVA 1) Correct the program below so that it can compile and run without any errors and prints the text “Hello World”...