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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java_common

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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 example: 62

In the following example, we will take inputs from the users and add negative numbers only. Let's take a look at the code first. If you want to rerun the code, write `java main` in the terminal: 

import java.util.Scanner;

/*
accept any 5 number and print the sum of only negative numbers
*/
public class main {

    static int num, sum = 0;
    static int controllingNumber = 1;

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter any 5 number: ");
        while (controllingNumber <= 5){
            num = sc.nextInt();
            if(num < 0){
                sum += num;
            }
            controllingNumber++;
        }
        System.out.println("The sum of only negative numbers: " + sum);
    }
}

import React from 'react';
import { shallow, configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new Adapter() });

import HelloWorld from './app';

var TestResult = function() {
    this.succeeded = false;
    this.reason = "";
    this.input = "";
    this.expected_output = "";
    this.actual_output = "";
}

export const executeTests = function() {

  var results = [];

  result = new TestResult();
  result.input = 'HelloWorld Component';
  result.expected_output = "span containing text 'Hello World'"

  let wrapper = shallow(<HelloWorld />);

  // Call your Challenge function here.

  let type = wrapper.type();
  let testSuccessful = true;
  let failureReason;

  if (type !== 'span') {
    testSuccessful = false;
    failureReason = "You need to render exactly one span HTML element";
  } else if (wrapper.props().children != "Hello World") {
     testSuccessful = false;
     failureReason = "You have rendered wrong message in your span element";
  }

  result.actual_output = wrapper.html();

  if (testSuccessful) {
    result.succeeded = true;
    result.reason = "Succeeded"
  } else {
    result.succeeded = false;
    result.reason = failureReason;
  }

  results.push(result);

  return results;
}


React

Dart

GoJS React

Typescript React

Vue.js

## Code explanation

As a user, you can insert any decimal value positive or negative, but our algorithm will determine which one to choose.


# Coding example: 63

In the same way, we can take inputs and print the sum of only odd numbers. If you want to rerun the code, write `java main` in the terminal: 

Learn about the ‘for’ and ‘while’ loops in more detail with the help of the examples 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

Examples of Loops: Part 1

Coding example: 62