What are the Java code challenges for beginners?
1. Building a Calculator
2. Writing a Telephone Directory Program
3. Building a Tic-Tac-Toe Application
4. Creating a Rock, Paper, Scissors Game
5. Crafting a Hangman Game
6. Reversing a String
7. Creating FizzBuzz
8. Working with Hash Tables
9. Building a Graph Data Structure
10. Writing a Small Database Engine
Date:2023-02-23
Is it safe to run Java JavaScript on a Windows computer?
Yes, it is safe to run JavaScript on a Windows computer. Java Script is not a virus or a malicious piece of code, so your computer won't be harmed by simply running it. However, if you download a malicious JavaScript program or open a JavaScript file with dangerous code, then your computer could be exposed to a security threat. As such, you should be careful what scripts you download and make sure to only download scripts from trusted sources.
Date:2023-02-23
What is JRE (Java Runtime Environment)?
Java Runtime Environment (JRE) is a software platform that allows users to run Java applications and applets. It includes the Java Virtual Machine (JVM), core classes and supporting files. The JRE is the run-time portion of the Java Development Kit (JDK). It contains the Java Virtual Machine (JVM), the Java libraries, and other components to run applications written in the Java programming language.
Date:2023-02-22
What is connector in Java EE?
A connector in Java EE is a Java API used for connecting an application to an enterprise information system (EIS). Connectors play an important role in the development of Enterprise Java applications because they allow an application to access enterprise information from remote systems. They provide a resource adapter architecture to connect an application to enterprise information systems like Enterprise Resource Planning (ERP) systems, mainframes, databases, and messaging systems.
Date:2023-02-22
How do you reference a variable in a Java program?
To reference a variable in a Java program, you need to use the variable's name. For example, if the variable name is "x", you would reference using "x" e.g. int x = 10; System.out.println(x);
Date:2023-02-22
How to capture response of form submit event with JavaScript?
You can use the "submit" event on the form element along with a callback function to capture the response of the form submit. This can be done by adding an event listener to the form element like this:
let form = document.querySelector('form');
form.addEventListener('submit', (event) => {
//capture the response here
});
Date:2023-02-21
How to interact with SQLite in Java?
1. Download and install the latest version of the SQLite JDBC driver.
2. Create and configure a JDBC connection to the SQLite database.
3. Use Java's standard SQL package, java.sql, to create and execute SQL statements.
4. Create an instance of a JDBC Statement object to send SQL commands to the SQLite database.
5. Use methods of the Statement object to execute SQL queries, insert new data into the database, or update existing data.
6. Retrieve results of executed queries with the ResultSet object.
7. Close the JDBC connection and the Statement when finished.
Date:2023-02-21
What is the difference between BufferedReader and readline in Java?
BufferedReader is a class used to read texts from a character-input stream. The readline() method is a method of the BufferedReader class that returns a single line of text read from the specified file object. The readline() method is used to read a single line of text from the specified file object.
Date:2023-02-20
When and how a Java class is loaded and initialized?
A Java class is loaded and initialized at the time of its first use. The class is located by the class loader, transformed into the Java Virtual Machine (JVM) instruction format, and stored in the Method Area. Then, the class is initialized and prepared for future use. The initialization process creates all static variables and instance variables and assigns appropriate values. The initialization process also creates a class reference in the runtime constant pool, into which will be written all the symbolic references to the fields, methods and classes referenced directly by the class. Finally, the class's static initializers and constructors are executed, in the order that the code declares them, and the class is ready for use.
Date:2023-02-20
What is a loader in JavaScript?
A loader in JavaScript is a module that can help with the loading and execution of other modules, such as scripts, images, and data. Loaders can help speed up development and minimize the amount of code needed to perform complex tasks.
Date:2023-02-18