Core Java - Overview Archives

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03: 9 Core Java Concepts you can’t afford to not know

Q1. How will you go about explaining the following Java concepts to a beginner who is starting to learn Java? 1. Process Vs Threads 2. Heap versus Stack 3. Local…

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04: Top 10 most common Core Java beginner mistakes

Mistake #1: Using floating point data types like float or double for monetary calculations. This can lead to rounding issues.

package com.monetary;
import java.math.BigDecimal;

public class MonetaryCalc {
 
    public static void main(String[] args) {
      System.out.println(1.05 - 0.42); //1:  $0.6300000000000001
       //2: $0.63
      System.out.println(new BigDecimal("1.05") .subtract(new BigDecimal("0.42")));
      //3: $0.630000000000000059952043329758453182876110076904296875
      System.out.println(new BigDecimal(1.05) .subtract(new BigDecimal(0.42)));
      //4: $0.63
      System.out.println(BigDecimal.valueOf(1.05)

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17 Java getting started interview questions and answers

These 17 beginner Java interview questions & answers are not only for the entry level job interviews, but also get a good grasp of the beginner level Java concepts.

Q1. Why use Java?
A1. Java is a very popular language as per the TIOBE index. Java is a mainstream programming language like C, C++, C#, and Python.…

Free Java & Resume Writing PDF Downloads

People more often buy the best advertised product than the best product. The same is true in marketing your personal services. If you want to market a product successfully, you must know the product. Many of you do not think in a marketing oriented way when it comes to selling your personal services.…

Java Compile-time Vs Run-time Interview Q&As

During development and design, one needs to think in terms of compile-time, run-time, and build-time. It will also help you understand the fundamentals better. These are beginner to intermediate level questions.

Q1. What is the difference between line A & line B in the following code snippet?…