Level 1.2: Find the maximum of 2 numbers (Java)

Table of Contents

• Overview
• Learning Objectives
• Setup and Tutorial
• Project Overview
• Submission Guidelines

Overview

In this project, you will write a Java program that finds the maximum of two numbers. You will use the Scanner class to read input from the user and the System.out.println method to display the result.

Learning Objectives

By the end of this project, you will be able to:

• Write a Java program that uses the Scanner class to read input from the user.
• Learn to use System.out.println method to display the result.
• Learn conditional if statement to compare two numbers and find the maximum.
• Learn the else statement to handle the case when the two numbers are equal.

Setup and Tutorial

1. Setup

1.1 Git and Github

To setup this project, please follow this simple git and github tutorial provided here

1.2 Java Development Kit (JDK)

To setup the Java Development Kit (JDK), please follow this simple tutorial provided here (Windows) or here (Mac)

2. Tutorial

2.1 Java Scanner Class

The Scanner class is used to get user input, and it is found in the java.util package. To use the Scanner class, create an object of the class and use any of the available methods found in the Scanner class.

Here is an example of how to use the Scanner class to read input from the user:

import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner myObj = new Scanner(System.in);
    System.out.println("Enter username");

    String userName = myObj.nextLine();
    System.out.println("Username is: " + userName);
  }
}

2.2 Java Conditional Statements

Java supports the usual logical conditions from mathematics:

• Less than: <
• Less than or equal to: <=
• Greater than: >
• Greater than or equal to: >=
• Equal to: ==
• Not equal to: !=
• Logical AND: &&
• Logical OR: ||
• Logical NOT: !

Java has the following conditional statements:

• Use if to specify a block of code to be executed, if a specified condition is true
• Use else to specify a block of code to be executed, if the same condition is false
• Use else if to specify a new condition to test, if the first condition is false

Here is an example of how to use the if statement to compare two numbers and find the maximum:

public class Main {
  public static void main(String[] args) {
    int x = 10;
    int y = 20;

    if (x > y) {
      System.out.println("x is greater than y");
    }
  }
}

Here is an example of how to use the else statement to handle the case when the two numbers are equal:

public class Main {
  public static void main(String[] args) {
    int x = 10;
    int y = 10;

    if (x > y) {
      System.out.println("x is greater than y");
    } else if (x < y) {
      System.out.println("x is less than y");
    } else {
      System.out.println("x is equal to y");
    }
  }
}

Project Overview

Your task is to write a Java program that finds the maximum of two numbers. You will use the Scanner class to read input from the user and the System.out.println method to display the result.

Requirements

• The program should prompt the user to enter two numbers.
• The program should use the Scanner class to read the two numbers from the user.
• The program should use the if statement to compare the two numbers and find the maximum.

Bonus

• The program should use the else statement to handle the case when the two numbers are equal.
• The program should use the System.out.println method to display the result.
• The program should have a pretty output to the console (Use some ascii art to make it look cool!)

Submission Guidelines

• The app should be pushed to Github and a pull request should be created. You can check how to push your code to Github in section 2.1.2 Add Changes.
• The pull request title should be in the following format: <your-name> - <project-name>. You can check how to make a pull request in section 2.1.5. Create a pull request.
• The pull request description should contain the following:
  • A description of your project.
  • A screenshot of the app.