Sprint Challenge - BD Unit 1 Sprint 1

Command-line and IDE Basics

• Navigate a command-line shell using basic commands (pwd, ls, cd, clear)
• Create, move, and delete files and directories (mkdir, touch, mv, rm)
• Understand and use absolute vs. relative paths
• Set up and configure IntelliJ IDEA
• Create and run Java projects in IntelliJ
• Use keyboard shortcuts to improve productivity

Git Basics

• Initialize a Git repository
• Clone a remote repository
• Stage and commit changes
• Push changes to a remote repository
• Pull changes from a remote repository
• Understand basic branching concepts

Variables and Arithmetic Operations

• Declare and initialize variables of various primitive types
• Understand Java's primitive data types and their limitations
• Perform arithmetic operations (+, -, *, /, %)
• Output text and variable values to the console
• Handle type conversion and casting
• Use arithmetic operators with variables

Sample Code

// Variable declarations
int age = 25;
double salary = 50000.50;
boolean isEmployed = true;

// Arithmetic operations
int sum = 10 + 5;              // 15
int difference = 20 - 8;       // 12
int product = 4 * 5;           // 20
double quotient = 10.0 / 3.0;  // 3.3333...
int remainder = 10 % 3;        // 1

// Type casting
int x = 5;
double y = (double) x / 2;     // 2.5

// Console output
System.out.println("Age: " + age);
System.out.println("Sum: " + sum);

Strings, User Input, and Comments

• Create and manipulate strings
• Use common string methods (length(), substring(), indexOf(), etc.)
• Read user input with Scanner
• Parse input strings to appropriate data types
• Document code with single-line and multi-line comments
• Use JavaDoc comments to document classes and methods

Sample Code

// String operations
String name = "Java Programming";
int length = name.length();                // 16
String sub = name.substring(0, 4);         // "Java"
boolean contains = name.contains("gram");  // true

// User input with Scanner
import java.util.Scanner;

Scanner scanner = new Scanner(System.in);
System.out.print("Enter your name: ");
String userName = scanner.nextLine();
System.out.println("Hello, " + userName + "!");

System.out.print("Enter your age: ");
int userAge = scanner.nextInt();
System.out.println("You will be " + (userAge + 10) + " in 10 years.");

// Comments
// This is a single-line comment

/*
 * This is a multi-line comment
 * It can span multiple lines
 */

/**
 * This is a JavaDoc comment
 * @param args command-line arguments
 * @return void
 */

Problem 1: Variable Manipulation

Write a Java program that:

1. Declares variables for a person's name, age, and height (in meters)
2. Calculates their height in centimeters
3. Calculates their age in months
4. Prints all information to the console in a readable format

Expected Output

Name: John Doe
Age: 25 years (300 months)
Height: 1.75 meters (175.0 centimeters)

Problem 2: User Input Processing

Write a Java program that:

1. Prompts the user to enter two numbers
2. Calculates the sum, difference, product, quotient, and remainder
3. Prints all calculations with appropriate labels
4. Handles potential errors (like division by zero)

Expected Output

Enter first number: 10
Enter second number: 3

10 + 3 = 13
10 - 3 = 7
10 * 3 = 30
10 / 3 = 3.3333...
10 % 3 = 1

Problem 3: String Manipulation

Write a Java program that:

1. Prompts the user to enter a sentence
2. Counts the number of words, characters, and spaces
3. Converts the sentence to uppercase and lowercase
4. Checks if the sentence contains a specific word (e.g., "Java")
5. Prints all this information to the console

Expected Output

Enter a sentence: Java programming is fun and challenging.

Original: Java programming is fun and challenging.
Words: 6
Characters: 41
Spaces: 5
Uppercase: JAVA PROGRAMMING IS FUN AND CHALLENGING.
Lowercase: java programming is fun and challenging.
Contains "fun": true
Contains "boring": false