The Origin and History of Java

Main features of Java

type of data

Operators and expressions

control flow statement

Concepts of classes and objects

Class definition and use

Inheritance and polymorphism

Java utility library

Java virtual machine

Exception and Error classes

trycatch statement block

throws keyword

File class and FileInputStream/FileOutputStream class

BufferedReader and BufferedWriter classes

DataInputStream and DataOutputStream classes

Basic concepts of network programming

Socket programming basics

ServerSocket programming basics

Thread class and Runnable interface

Thread status and transitions

synchronized keyword and Lock interface

Basic concepts and classification of data structures

Basic data structures such as arrays, linked lists, stacks, and queues, as well as application scenarios and implementation principles

Sorting algorithms (such as bubble sort, selection sort, insertion sort, quick sort, etc.) and application scenarios and implementation principles

Basic concepts and uses of JDBC

How to install and use the JDBC driver (taking MySQL as an example)

Basic syntax and application of SQL statements (such as creating tables, inserting data, querying data, etc.)