JAVA 8: Zero To Hero with Lambdas & Streams

Compare sequential and parallel streams in Java 8 by timing a salary-based filter on an employee list, and learn how parallel streams can boost performance.

Learn to read a file line by line in Java eight using files.readAllLines, manage the file path, handle exceptions, and print each line to the console.

Learn to read data from files with java 8 stream API using files.lines, print results, and use parallel streams to handle large numbers of files efficiently.

Read all bytes from a file path into a string, print the resulting content, and prepare the data for processing or sending to another method.

Learn to read csv files with java 8 by creating a csv, saving as myfile.csv, reading with Files.lines, splitting lines on comma, and collecting to a list of string arrays.

Learn how to write data to a file in Java eight using Files.write with a path, content as bytes, and create or append open options.

Explore the Java 8 date API with local date, printing current and specific dates, formatting, time zones via zone id, and simple date arithmetic like adding days.

Explore local time in Java 8 with LocalTime, creating times with now and of, reading hours, minutes, seconds, and nanoseconds, and using zone-aware methods for a specific time zone.

Create and print local date, local time, and local date time using now and of, including specific dates, times, and time zones.

Learn to use Java date API utility methods to create local dates, check leap years, compare dates, and perform date arithmetic with plus, minus, and until period calculations.

Learn to format dates and times in Java 8 using the date time format, exploring patterns, basic ISO date, and date time formatters to print date, time, and milliseconds.

Learn how default methods in Java 8 interfaces use the default keyword to provide implementations, enabling backward compatibility and optional overrides.

When two interfaces define the same default method, implementing both requires overriding that method and selecting which default to use, optionally calling super to access the chosen default.

Explore static methods in Java 8 interfaces and how they group related calculations without overriding. Call these methods through the interface name to preserve backward compatibility.

Explore the optional type in Java 8 and use streams to find the first country starting with a given name, handling missing values with orElse.

Learn how to call a JavaScript function from Java 8 using a script engine, evaluate scripts or files, and print results. Note this works on Java 8, not open JDK.

Create a simple Java 18 file server to host static pages from a folder, configure the address and path, and start it to serve test.html and JSON files on localhost.