升级到 Java SE 11 开发者考试大纲

升级到 Java SE 11 开发者考试大纲

Understanding Modules

• Describe the Modular JDK
• Declare modules and enable access between modules
• Describe how a modular project is compiled and run

Migration to a Modular Application

• Migrate the application developed using a Java version prior to SE 9 to SE 11 including top-down and bottom-up migration, splitting a Java SE 8 application into modules for migration
• Use jdeps to determine dependencies and identify way to address the cyclic dependencies

Services in a Modular Application

• Describe the components of Services including directives
• Design a service type, load the services using ServiceLoader, check for dependencies of the services including consumer module and provider module

Local-Variable Type Inference

• Use local-variable type inference
• Create and use lambda expressions with local-variable type inferred parameters

Java Interfaces

• Create and use methods in interfaces
• Define and write functional interfaces

Lambda Expressions

• Create and use lambda expressions
• Use lambda expressions and method references
• Use built-in functional interfaces including Predicate, Consumer, Function, and Supplier
• Use primitive and binary variations of base interfaces of java.util.function package

Lambda Operations on Streams

• Extract stream data using map, peek and flatMap methods
• Search stream data using search findFirst, findAny, anyMatch, allMatch and noneMatch methods
• Use the Optional class
• Perform calculations using count, max, min, average and sum stream operations
• Sort a collection using lambda expressions
• Use Collectors with streams, including the groupingBy and partitioningBy operation

Parallel Streams

• Develop the code that use parallel streams
• Implement decomposition and reduction with streams

Java File I/O (NIO.2)

• Use Path interface to operate on file and directory paths
• Use Files class to check, delete, copy or move a file or directory
• Use Stream API with Files

Language Enhancements

• Use try-with-resources construct
• Develop code that handles multiple Exception types in a single catch block