Java article introduction:

Syntax

Java classloader

Data types

  • what are wrapper calsses (
  • string pool

Keywords (Static block)

What are Java enum

Java annotations

Access modifiers

Polymorphism

Java composition

Java collection : comparable and comparator

Abstraction:

  • interface vs abstract class
  • marker interface

Static import

Exception (multiple catch block)

Garbage collection

Java reflection API

What are anonymous inner class

Java ternary operator

Super keyword in java

tring