Gain insights into Java essentials, including programming paradigms, objects, data types, and algorithms. Delve into extensive exercises to prepare for a software development career.

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This course is your detailed guide to the fundamentals of the Java programming language. This course will get you on the fast track to becoming a proficient and modern Java developer.

In this course, you will start by covering different programming paradigms like object-oriented and procedural programming. You will then cover the fundamentals of programming in Java such as: objects and data types, variables, arrays, and conditional statements.

In the latter half of the course, you will cover iterative constructs, useful algorithms, and data structures. With over 100 problems, 11 quizzes, and 9 challenges, this course will get you prepared for a career in software development.

A Complete Guide to Java Programming

# Coding solution

Let’s take a look at the solution first.



class DecimalToBinary{

    public Integer Decimal2Binary(Integer myDecimalNumber) {

        if (myDecimalNumber == 0) {
            return myDecimalNumber;
        }

        StringBuilder myBinaryNumber = new StringBuilder();
        Integer quotient = myDecimalNumber;

        //we keep dividing the quotient until the quotient becomes 0
        while (quotient > 0) {
            int remainder = quotient % 2;
            myBinaryNumber.append(remainder);
            quotient /= 2;
        }

        myBinaryNumber = myBinaryNumber.reverse();
        return Integer.valueOf(myBinaryNumber.toString());
    }
}

public class DtoB {

    public static void main(String []args) {
        Integer number = 10;
        DecimalToBinary myNumber = new DecimalToBinary();
        System.out.print("The binary of " + number + " is " +
        myNumber.Decimal2Binary(number));
    }
}

## Explanation

- The lines (**6** -- **8**) identify if the number is equal to `0` then return the number as both the binary and decimal value of `0` is `0`.

- The lines (**14** -- **18**) keep dividing the number until the `quotient` is greater than `0`. The result of each iteration is stored appended to `myBinaryNumber` but in reverse order.

- Line **20** is doing the trick to reverse the number to show the actual binary number representation.




Understand the solution of the Decimal to Binary Conversion exercise in this lesson.

Java, a High Level Language with a Purpose

How Java Programming Works

Objects and Data Types

Variables: The Name of a Field

Arrays: The Container Objects

Operators and Conditional Statements

Iterative Constructs, Entry and Exit Controlled Loops

Algorithms

Basic Input and Output

Classes and Objects

Interface and Abstraction

Exception Handling and Data Structures

Conclusion

Appendix

Solution Review: Decimal to Binary Conversion

Coding solution