Java Skill Overview

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template as is or customize it to fit your needs and environment.

    Category: Technical > Programming languages

Description

Java is a versatile, object-oriented programming language used for developing applications ranging from mobile apps to large-scale enterprise systems. It offers features like robustness, security, and platform independence which make it a popular choice among developers. Java skills involve understanding its syntax, data types, control flow structures, and object-oriented concepts at a basic level. As one advances, they learn about arrays, libraries, exception handling, file operations, and more complex concepts like multithreading, generics, and database connectivity. Expertise in Java involves knowledge of JVM internals, bytecode, performance tuning techniques, security APIs, and enterprise technologies. Mastery of Java can open doors to various roles in software development and engineering.

Stacks

Spring,
Java,

Expected Behaviors

  • Fundamental Awareness

    At this level, individuals have a basic understanding of Java syntax and data types. They are familiar with control flow structures such as if-else and switch-case statements, and can use loops like for, while, and do-while. They also have a basic understanding of object-oriented programming concepts like classes, objects, and inheritance.

  • Novice

    Novices can write simple Java programs and understand how to use arrays and strings. They can utilize basic Java libraries and APIs, handle exceptions, perform basic file I/O operations, and have an understanding of the Java collections framework.

  • Intermediate

    Intermediate users can use advanced OOP concepts like polymorphism, abstraction, and encapsulation. They can use interfaces and abstract classes, understand multithreading and concurrency, use generics, understand the Java memory model, and use JDBC for database connectivity.

  • Advanced

    Advanced users can use Java 8 features like streams and lambda expressions, understand and use Java networking, reflection API, and JavaFX for GUI development. They can use JPA/Hibernate for ORM and have an understanding of the Spring Framework.

  • Expert

    Experts understand JVM internals and Java bytecode. They can perform Java performance tuning techniques, use Java security APIs, understand and use Java EE technologies like Servlets, JSP, JSF, EJB, and can use microservices architecture with Spring Boot.

Micro Skills

Understanding of access modifiers

Understanding of non-access modifiers

Understanding of control flow keywords

Understanding of data type declaration

Understanding of variable initialization

Understanding of method syntax

Understanding of method invocation

Understanding of class syntax

Understanding of object creation

Understanding of constructor syntax

Understanding of constructor invocation

Understanding of extends keyword

Understanding of superclass reference

Understanding of override annotation

Understanding of rules for method overriding

Understanding of Java program structure

Ability to use Java IDEs (Eclipse, IntelliJ)

Knowledge of Java coding standards and best practices

Ability to debug Java programs

Knowledge of array declaration and initialization

Understanding of multidimensional arrays

Understanding of string manipulation methods

Understanding of string immutability

Understanding of Java Standard Edition API

Knowledge of commonly used classes in java.lang package

Understanding of Math class and its methods

Understanding of wrapper classes

Understanding of try-catch-finally blocks

Understanding of checked and unchecked exceptions

Ability to create custom exceptions

Understanding of exception propagation

Understanding of java.io package

Ability to read from and write to a file

Understanding of byte streams and character streams

Understanding of buffer and buffering

Understanding of Collection interface and its common methods

Understanding of List, Set and Map interfaces

Understanding of various classes implementing these interfaces (ArrayList, LinkedList, HashSet, TreeSet, HashMap, TreeMap)

Understanding of Iterator and ListIterator

Understanding of polymorphism and its types

Ability to implement polymorphism in Java

Understanding of abstraction and its importance

Ability to create abstract classes and interfaces

Understanding of encapsulation and its benefits

Ability to implement encapsulation in Java

Understanding of interfaces and their usage

Ability to create and implement interfaces

Understanding of abstract classes and their usage

Ability to create and use abstract classes

Understanding of threads and their lifecycle

Ability to create and manage threads

Understanding of synchronization and its importance

Ability to implement synchronization in Java

Understanding of deadlock and ways to prevent it

Understanding of Java concurrency utilities

Understanding of generics and their benefits

Ability to create generic classes, methods, and interfaces

Understanding of bounded type parameters

Understanding of wildcards in generics

Understanding of heap and stack memory

Understanding of garbage collection and its process

Understanding of memory leaks and ways to prevent them

Understanding of final, finalize, and finally

Understanding of JDBC and its architecture

Ability to establish a connection with the database

Ability to execute SQL queries using JDBC

Understanding of transaction management in JDBC

Understanding of PreparedStatement and CallableStatement

Knowledge of functional programming principles

Ability to use Stream API for data manipulation

Ability to write and use lambda expressions

Understanding and use of Optional class

Understanding and use of new Date and Time API

Knowledge of networking fundamentals

Ability to create client-server applications using sockets

Understanding and use of URL and URI classes

Understanding and use of java.net package

Knowledge of reflection basics

Ability to inspect classes, interfaces, fields and methods at runtime

Ability to instantiate objects, invoke methods and change field values dynamically

Knowledge of JavaFX basics

Ability to create user interfaces with JavaFX controls

Understanding and use of JavaFX layout managers

Understanding and use of JavaFX events and bindings

Understanding and use of JavaFX CSS for styling

Knowledge of ORM basics

Ability to map Java classes to database tables using annotations

Understanding and use of Hibernate Query Language (HQL)

Understanding and use of transactions and caching in Hibernate

Knowledge of DI and IoC basics

Ability to create and configure Spring beans

Understanding and use of Spring MVC for web applications

Understanding and use of Spring Data for database access

Understanding and use of Spring Security for authentication and authorization

Knowledge of JVM architecture

Understanding of class loading process

Understanding of JIT compilation

Understanding of garbage collection and memory management

Ability to read and understand Java bytecode

Understanding of how Java source code is compiled into bytecode

Understanding of how bytecode is executed in JVM

Knowledge of tools for bytecode manipulation and analysis

Understanding of profiling and benchmarking

Knowledge of performance optimization techniques

Understanding of JVM tuning

Understanding of garbage collector tuning

Understanding of Java cryptography architecture

Understanding of Java secure coding practices

Understanding of Java authentication and authorization service (JAAS)

Understanding of Java secure socket extension (JSSE)

Understanding and use of Servlets and JSP for web application development

Understanding and use of JSF for building user interfaces

Understanding and use of EJB for business logic

Understanding of Java EE containers and deployment

Understanding of microservices architecture principles

Ability to develop microservices using Spring Boot

Understanding of Spring Cloud for microservices infrastructure

Understanding of containerization and orchestration with Docker and Kubernetes

Tech Experts

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StackFactor Team
We pride ourselves on utilizing a team of seasoned experts who diligently curate roles, skills, and learning paths by harnessing the power of artificial intelligence and conducting extensive research. Our cutting-edge approach ensures that we not only identify the most relevant opportunities for growth and development but also tailor them to the unique needs and aspirations of each individual. This synergy between human expertise and advanced technology allows us to deliver an exceptional, personalized experience that empowers everybody to thrive in their professional journeys.
  • Expert
    3 years work experience
  • Achievement Ownership
    Yes
  • Micro-skills
    118
  • Roles requiring skill
    16
  • Customizable
    Yes
  • Last Update
    Mon Jun 03 2024
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