MindMap Gallery Java common interview questions
This is a mind map about common Java interview questions, which are very beneficial for candidates. Can help candidates better prepare for interviews, understand industry needs, improve skill levels and enhance competitiveness.
Edited at 2024-02-14 23:16:28Avatar 3 centers on the Sully family, showcasing the internal rift caused by the sacrifice of their eldest son, and their alliance with other tribes on Pandora against the external conflict of the Ashbringers, who adhere to the philosophy of fire and are allied with humans. It explores the grand themes of family, faith, and survival.
This article discusses the Easter eggs and homages in Zootopia 2 that you may have discovered. The main content includes: character and archetype Easter eggs, cinematic universe crossover Easter eggs, animal ecology and behavior references, symbol and metaphor Easter eggs, social satire and brand allusions, and emotional storylines and sequel foreshadowing.
[Zootopia Character Relationship Chart] The idealistic rabbit police officer Judy and the cynical fox conman Nick form a charmingly contrasting duo, rising from street hustlers to become Zootopia police officers!
Avatar 3 centers on the Sully family, showcasing the internal rift caused by the sacrifice of their eldest son, and their alliance with other tribes on Pandora against the external conflict of the Ashbringers, who adhere to the philosophy of fire and are allied with humans. It explores the grand themes of family, faith, and survival.
This article discusses the Easter eggs and homages in Zootopia 2 that you may have discovered. The main content includes: character and archetype Easter eggs, cinematic universe crossover Easter eggs, animal ecology and behavior references, symbol and metaphor Easter eggs, social satire and brand allusions, and emotional storylines and sequel foreshadowing.
[Zootopia Character Relationship Chart] The idealistic rabbit police officer Judy and the cynical fox conman Nick form a charmingly contrasting duo, rising from street hustlers to become Zootopia police officers!
Java common interview questions
Java basics
The difference between object-oriented and process-oriented
Process-oriented is a process-centered programming idea
Advantages: Streamlined, easy to understand and implement
Disadvantages: difficult to deal with complex systems, difficult to reuse and maintain
Object-oriented is an object-centered programming idea
Advantages: easy to deal with complex systems, easy to reuse and maintain
Disadvantages: Difficult to understand and implement
Features of Java
simplicity
Simple syntax, easy to learn and use
object-oriented
Encapsulation, inheritance, polymorphism
platform independence
Runs cross-platform, write once, run anywhere
safety
Strong type checking to avoid illegal access
Robustness
Automatic garbage collection to avoid memory leaks
Java syntax
Variables and data types
Basic data types
Integer, floating point, character, Boolean
Reference data type
Class, interface, array
operator
arithmetic operators
Addition, subtraction, multiplication, division, modulo
Relational operators
Greater than, less than, equal to, not equal to
Logical Operators
AND, OR, NOT, XOR
control structure
Conditional statements
if, else, else if
loop statement
for, while, do while
Java object-oriented
classes and objects
Class definition
Properties and methods
Creation and use of objects
new keyword, access properties and methods
encapsulation
Hide implementation details and provide a public interface
inherit
Subclasses inherit the properties and methods of parent classes
Polymorphism
The same method shows different behaviors in different objects
Java Collections
collection framework
List, Set, Map
Collection implementation
ArrayList, LinkedList, HashSet, TreeSet, HashMap, TreeMap
Java exception handling
Anomaly classification
Runtime exception, non-runtime exception
Exception handling
try, catch, finally
Java multithreading
Thread concept
Thread is the smallest unit of program execution
Thread status
new, ready, running, blocked, dead
Thread synchronization
synchronized, volatile, ReentrantLock
JavaIO
File operations
File, FileInputStream, FileOutputStream
Stream operations
InputStream, OutputStream, Reader, Writer
Java network programming
Socket programming
ServerSocket, Socket
URLs and URIs
URL, URI, URLConnection
Java database programming
JDBC
Connect to the database, execute SQL statements, and process result sets
JavaWeb
Servlet
Servlet life cycle, request and response
JSP
JSP syntax, JSP tags, JSTL
Java framework
Spring
IoC, AOP, Spring MVC
Hibernate
ORM, Hibernate configuration, Hibernate query
MyBatis
MyBatis configuration, MyBatis query
Java design patterns
Singleton pattern
Hungry Man Style, Lazy Man Style
Factory pattern
Simple factory, factory method, abstract factory
Observer pattern
observer, observed, event
strategy pattern
policy, context, client
decorator pattern
decorator, decorator, client
adapter mode
adapter, adaptee, client
proxy mode
Agent, proxy, client
Java performance optimization
Performance analysis tools
JProfiler, YourKit, VisualVM
Performance optimization strategies
Reduce object creation, use thread pools, use cache, reduce database access