Course Description

Prepare to pass exam: Java SE 11 Developer

Candidates who hold this certification have demonstrated proficiency in Java (Standard Edition) software development recognized by a wide range of world-wide industries. They have also exhibited thorough and broad knowledge of the Java programming language, coding practices and utilization of new features incorporated into Java SE 11. By passing the required exam, a certified individual proves tremendous fluency in Java SE and acquisition of the valuable professional skills required to be a Java software developer. This includes a deep understanding of object-orientation, functional programming through lambda expressions and streams, and modularity.

To pass the Java SE 11 Developer exam, focus on mastering key areas such as Java language features, OOP principles, functional programming, and handling exceptions. Understand modules, streams, and I/O, and practice coding scenarios involving collections, concurrency, and JDBC. Reviewing the Java API documentation and practicing with mock exams will enhance your problem-solving skills. Make sure to implement real-world examples to solidify your understanding of topics like Lambdas, Streams, and Optional classes. Consistent coding practice and reviewing exam-specific guides will prepare you for success.

Additionally, focus on topics like generics, annotations, and local variable type inference to deepen your knowledge. Regularly testing yourself with coding challenges and reviewing any mistakes will boost your confidence for the exam.

Exam topics covered

Working with Java data types

• Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
  
• Handle text using String and StringBuilder classes
• Use local variable type inference, including as lambda parameters

Controlling Program Flow

• Create and use loops, if/else, and switch statements
  

Java Object-Oriented Approach

• Declare and instantiate Java objects including nested class objects, and explain objects' lifecycles (including creation, dereferencing by reassignment, and garbage collection)
  
• Define and use fields and methods, including instance, static and overloaded methods
• Initialize objects and their members using instance and static initialiser statements and constructors
• Understand variable scopes, apply encapsulation and make objects immutable
• Create and use subclasses and superclasses, including abstract classes
• Utilize polymorphism and casting to call methods, differentiate object type versus reference type
• Create and use interfaces, identify functional interfaces, and utilize private, static, and default methods
• Create and use enumerations

Exception Handling

• Handle exceptions using try/catch/finally clauses, try-with-resource, and multi-catch statements
  
• Create and use custom exceptions

Working with Arrays and Collections

• Use generics, including wildcards
  
• Use a Java array and List, Set, Map and Deque collections, including convenience methods
• Sort collections and arrays using Comparator and Comparable interfaces

Working with Streams and Lambda expressions

• Implement functional interfaces using lambda expressions, including interfaces from the java.util.function package
  
• Use Java Streams to filter, transform and process data
• Perform decomposition and reduction, including grouping and partitioning on sequential and parallel streams

Java Platform Module System

• Deploy and execute modular applications, including automatic modules
  
• Declare, use, and expose modules, including the use of services

Concurrency

• Create worker threads using Runnable and Callable, and manage concurrency using an ExecutorService and java.util.concurrent API
  
• Develop thread-safe code, using different locking mechanisms and java.util.concurrent API

Java I/O API

• Read and write console and file data using I/O Streams
  
• Implement serialization and deserialization techniques on Java objects
• Handle file system objects using java.nio.file API

Secure Coding in Java SE Application

• Develop code that mitigates security threats such as denial of service, code injection, input validation and ensure data integrity
  
• Secure resource access including filesystems, manage policies and execute privileged code

Database Applications with JDBC

• Connect to and perform database SQL operations, process query results using JDBC API
  

Localization

• Implement Localization using Locale, resource bundles, and Java APIs to parse and format messages, dates, and numbers
  

Annotations

• Create, apply, and process annotations