Java Bootcamp | Basics, OOP, Projects, Swing, JDBC & JavaFX

Explore primitive and non-primitive data types in Java, learn how variables allocate memory, and differentiate int, short, float, double, char, and boolean with step-by-step explanations.

Learn how to perform concatenation in Java using the plus operator to join strings and numbers, and distinguish it from arithmetic with practical examples.

Master using single-line and multi-line comments in Java to document code, aid future maintenance, and help teams understand what each part does.

Explore arrays in Java, a memory-efficient data structure that stores a fixed-size, sequential collection of similar data. Access numbers and strings with zero-based indices using for loops for clean code.

Enumeration in Java defines a data type with a fixed set of constants to restrict variables and reduce bugs, and enums support switch usage and can have constructors or methods.

Explore reserved keywords in Java, learn that keywords are case sensitive and cannot be used as variables, classes, or methods, and review examples like abstract and boolean.

Import java.util.Scanner and create a scanner to collect user details such as first name, last name, and phone number, then display the results.

Explore dates and times in Java by building a date time class, a main method, and a parameterized constructor to display today's date with a simple date format.

Explore how if statements drive decision making in Java by examining a simple x variable example, showing condition based execution and the need to balance logic.

Explore the if else statement in Java, using conditions and else branches to handle cases when a condition is not met, with practical examples.

Master Java decision making with if else if else, testing multiple conditions such as x < 20, x == 100, x == 80, and a final else for others.

Master the Java switch statement by checking a char grade, using break to control flow, and handling default cases to produce clear results for A–F.

Explore how nested if statements work in Java, where one if condition sits inside another to form layered decision making, with practical code examples.

Explore the while loop in Java, an entry control loop that tests its condition before each iteration. See how a starting value increments until the condition stops the loop.

Explore how the for loop in Java replaces while loops with inline initialization, condition, and increment. See simple examples from 0 to 9 and 15 to 29.

Explore the enhanced for loop in Java to iterate over arrays of integers and strings, printing elements with System.out.println.

Explore the do while loop in Java, compare it with while and for loops, and follow practical examples that increment a value from 15 to 30.

Use the break statement in Java to terminate loops and switch cases, illustrated by an enhanced for loop example that stops execution at a threshold.

Demonstrate the continue statement in Java loops using a for and enhanced for loop to skip 15 and resume at 20, printing 5, 10, 20, 25.

Explore arithmetic operators in Java, including plus, minus, multiplication, division, modulus, increment, and decrement in simple expressions. See how these operators compute results with example values a, b, and c.

Explore how logical operators in Java work, including and, or, and not, with true/false examples of A and B and practical practice.

Explore assignment operators in Java by applying plus-equal, minus-equal, and multiply-equal to the left operand, and review bitwise and and exclusive or assignments.

Explore the Java conditional (ternary) operator, its three operands, and how it evaluates boolean expressions to decide which values to assign, illustrated by practical examples.

Explore the instance of operator in Java, which checks an object's type and returns a boolean, with examples using string and integer variables.

Learn bitwise operators and binary arithmetic using a programmer's calculator, covering and, or, xor, and left and right shifts with practical examples.

Explore how Java handles numbers, using primitive types like byte, short, int, long, float, and double, and methods to convert between them, plus math with pi, powers, roots, and exponentials.

Learn how boxing and unboxing convert primitive numbers into objects in Java, with the compiler handling the conversion and examples using floats.

Learn to use the compareto method in Java to compare numbers, returning -1, 0, or 1. Apply it to primitive types like integers, bytes, longs, and floats with practical examples.

Learn how the Java equals method compares numbers, returning true or false, and why you must compare the same primitive types, since a null argument yields false to avoid mismatches.

Explore the Java toString method usage for numbers, converting primitive values to string representations, printing ten and five, and understanding how radix affects string output.

Explore how the valueOf method returns the value of various arguments, including primitive types and string representations, and how a static method can accept multiple arguments.

Master parse int and parse double in Java by converting strings to primitive types using static methods with one or two arguments and an optional radix.

Explore the absolute method in Java by applying Math.abs to int, float, and double variables to obtain their absolute values, as shown with negative x, y, and z examples.

Explore the ceil method in Java, which returns the smallest integer value greater than or equal to a double or float input, as shown with -40.985 and 20.

Explore the floor method in Java, which returns the largest integer less than or equal to a double or float, with examples using -40.989 and -30.

Explore the round method in Java and how it returns the closest long integer value for numeric primitives. See examples with doubles and floats and practical usage.

Apply the direct method to round to the nearest integer, using doubles and floats. See examples: 70.550 becomes 71.0, 70.480 stays 70.0.

Master the exponential method in Java by computing e^x and formatting the result with customizable precision using printf-style formatting, as shown with x = 11.635 and varying decimals.

Explore the maximum method in Java, the opposite of the minimum method, which accepts two numeric primitive arguments and returns the larger value with practical examples.

Use the minimum method in Java to accept two numeric primitive arguments and return the lowest among them for int, float, long, or double.

Explore the logarithm method in Java for numeric primitive data types using Math.log, including practical examples with doubles and formatting results to three decimal places.

Explore the power method in Java, which computes x raised to the power of y using two arguments, with x 9.729 and y 4.987 yielding 84,624.503.

Demonstrate the square root method in Java by using a double and verifying results against a calculator. Explore applying it to data types like int, short, long, float, and double.

Learn how to compute the sine of a double value in Java, handling degrees and radians, with practical code examples and calculator verification.

Explore the cosine method in Java, following the sine method, by using the Math.cos function and verifying results with a calculator.

Explore the tangent method in Java to compute tangent values for numbers and angles, using code to calculate tangent with precision and verify results like tan 45 degrees.

Explore the arc sine method in Java through hands-on examples that convert between degrees and radians, and verify sine and cosine relationships, such as 55 degrees yielding 0.8192 and back.

Explore the cosine method in Java, including how 0.7071 corresponds to 45 degrees. Run the code, test values toward 90, and use Q&A for help.

Explore the arctangent method in Java, compare it with sine and cosine, and learn to run and test arctangent code across different degrees on your laptop.

Explore random number generation in Java by using the random method that requires no arguments, producing different values with each run and illustrating its role in password generation.

Explore the Java degree method to convert numbers to degrees. Use double x and y with 90 and 45 as arguments and run to see results.

Discover how the gradient method in Java converts numbers to radians and gradients, with example inputs 90 and 40 and executable demonstrations.

Check a specified value with the latter method in Java; it returns true if the first character is a character, otherwise false, helping verify user input in programs.

Explore the digit method in Java, which tests whether an input is a numeric digit and returns true for digits and false for letters or non-digits, with practical examples.

Explore the is white space method in Java, learn how whitespace characters affect strings, and test with examples to determine when a string contains spaces.

Explore the uppercase method in Java, learn how it checks whether a character is uppercase, returns a boolean, and see examples comparing lowercase and uppercase letters.

Explore the lowercase method in Java, which checks whether a character is lowercase or uppercase and returns a boolean true for lowercase and false for uppercase, with practical code demos.

Explore the toUpperCase method in Java that converts lowercase characters to uppercase, with examples showing inputs becoming uppercase.

Learn how the toLowerCase method in Java converts uppercase arguments to lowercase, illustrated with a practical example and code run-through.

Explore the StringBuffer append method and how it updates the buffer by appending booleans, numbers, strings, and other primitives. See how append joins words to display a combined message.

learn how to use the string buffer reverse method to invert the contents of a string buffer in java, with a demo that shows the reversed characters.

Explore how the string buffer delete method in Java removes characters by index, demonstrating zero-based ranges and practical practice with sample words.

Demonstrates the string buffer insert method in Java, showing how to insert strings at any index to build or modify text, with index examples.

Master the string replace method in java by replacing substrings using start and end indices, with examples that turn 'welcome to java programming' into 'hello' or 'video tutorial'.

Learn how to use Java's string length method to determine the number of characters in a string, illustrated with a hello example.

Master string concatenation in Java by using the plus sign to join strings, numbers, and other data types, and display results clearly.

Discover the CharAt method in Java to retrieve a character at an index from a string. Practice zero-based indexing, e.g., 'J' at index 0 and 'P' at index 5.

Explore the concat method in Java for joining strings, compare it to plus sign concatenation, and see outputs like Java is very interesting and Java is very amazing.

Explore how Java treats everything as an object in this object oriented primer. Build a car class with name, model, color, and tires to see object behavior.

Discover how a class acts as an entity blueprint in Java, grouping fields and methods within a car example to cover engine, interior, and exterior components.

Explore core object oriented programming concepts—inheritance, encapsulation, abstraction, and polymorphism—with practical examples, including single, multi-level, and hierarchical inheritance in Java.

Understand how a Java method performs a task when you call it from the main method, and that classes contain unlimited methods and void methods return nothing.

Explore method overriding in Java by comparing a car class and a vehicle subclass, showing how a motor method is overridden to customize behavior in derived objects.

Learn how Java constructors initialize objects, distinguish default and parameterized constructors, and understand that constructors are automatically invoked during object creation and have no return type.

Explore multi-level inheritance in Java by tracing how house, duplex, and appliances form a chain of parent and child classes, and contrast with single inheritance.

Java interfaces connect classes through extend or implement, create and implement an interface, and run a sample with a void display method.

Explain abstraction as hiding implementation and exposing functionality through abstract classes and interfaces, with abstract classes containing abstract methods that cannot be instantiated and require inheritance to implement.

Learn how the this keyword in Java references the current object and enables calling methods from instance methods or constructors, illustrated by a car example with hello and moto.

Explore multithreading in Java, learning how to run concurrent threads by extending the thread class or implementing runnable, with real-world examples like a browser handling tasks in parallel.

Learn how encapsulation in java binds data and code, hides fields by making them private, and exposes values via public getters and setters with practical examples.

Learn how Java handles runtime errors with exception handling, covering checked and unchecked exceptions, errors, and try-catch blocks, illustrated by division by zero and array index out of bounds.

Explore basics of Java GUI with Swing, learning components like text fields, combo boxes, labels, checkboxes, radio buttons, separators, and buttons to build a real-time clock and a simple calculator.

Install the window builder in Eclipse via help > install new software, add general purpose tools such as swing designer, then restart Eclipse to enable your first Java GUI project.

Build your first Java GUI project with Window Builder, exploring design and source views, absolute layout, and adding buttons and text fields that trigger a welcome message.

Create a simple Java GUI calculator for addition and subtraction using text fields, add/subtract buttons, and a result display with integer input validation.

Develop a simple date time clock in a Java GUI project by displaying the current time and date on a clock label and updating every second using the Gregorian calendar.