To learn core Java-related technologies and knowledge, you can follow the steps below:
Learn the basics of Java:
Start learning from the basics of the Java language, and understand basic concepts such as syntax, data types, operators, and control flow.
Self-study can be done through online tutorials, books or learning resources, such as Oracle's official Java tutorials, Java programming books, etc.
Learn Object Oriented Programming (OOP):
Java is an object-oriented programming language, and it is very important to understand and master the concepts and principles of object-oriented programming.
Learn concepts like classes, objects, inheritance, polymorphism, encapsulation, and practice programming with them.
Master the Java core library:
Understand and be familiar with the Java core library, such as java.lang, java.util, java.io and other packages, and learn to use the classes and methods provided in the library to solve common programming problems.
Multithreaded programming:
Learn Java multi-thread programming, understand the concept of thread, thread life cycle, thread synchronization and mutual exclusion, etc., and master the skills of using thread to handle concurrent programming and improve program performance.
Exception handling:
Understand the exception handling mechanism in Java, learn how to catch and handle exceptions, and write robust code.
Learn the Java Collections Framework:
Familiar with the Java collection framework, including data structures such as lists, collections, and maps, and learn how to use collections for data manipulation and management.
Learn I/O programming:
Understand the input and output (I/O) operations of Java, including file reading and writing, network programming, etc., and learn to use the API provided by Java for data input and output.
Learning core Java technology and knowledge requires an attitude of persistent learning, practice and continuous improvement.
Through systematic learning and practice, gradually understand and master the core concepts and technologies of Java programming, so as to become an excellent Java developer