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Exam Information
Official specifications published by Oracle
Exam Format
120 min
68
65%
Professional
Registration
Pearson VUE or online proctoring
English, Chinese Simplified (CHS) - Taiwan only
Validity
Certification does not expire, but Oracle recommends staying current with newer Java versions
No mandatory recertification required; Can upgrade to Java SE 11 by taking upgrade exam 1Z0-817; Can pursue newer Java certifications (Java SE 11, Java SE 17, etc.)
1Z0-809 Exam Topics and Domains
1Z0-809 is organized into 12 weighted domains. Expect to work with Java Core Language, java.util.stream.Stream, java.util.function, java.time, and more.
1
Java Class Design
Implement encapsulation
Access modifiers and encapsulation principles
- Understand and implement proper encapsulation using access modifiers
- Design classes that hide implementation details
Implement inheritance including visibility modifiers and composition
Inheritance and composition patterns
- Implement class inheritance correctly
- Understand visibility rules in inheritance
- Apply composition patterns effectively
Implement polymorphism
Runtime polymorphism and method dispatch
- Apply polymorphism in object-oriented design
- Understand runtime method resolution
Override hashCode, equals, and toString methods from Object class
Object class method overriding
- Override Object methods correctly
- Understand and maintain the hashCode-equals contract
Create and use singleton classes and immutable classes
Design patterns: Singleton and Immutability
- Implement the singleton pattern correctly
- Create immutable classes following best practices
Develop code that uses static keyword on initialize blocks, variables, methods, and classes
Static members and initialization
- Use static keyword appropriately
- Understand static initialization sequence
2
Advanced Java Class Design
Develop code that uses abstract classes and methods
Abstract classes and abstract methods
- Design and implement abstract classes
- Understand abstract class constraints
Develop code that uses the final keyword
Final variables, methods, and classes
- Apply final keyword appropriately
- Understand final's impact on inheritance
Create inner classes including static inner class, local class, nested class, and anonymous inner class
Inner and nested classes
- Create and use various types of inner classes
- Understand inner class access capabilities
Use enumerated types including methods, and constructors in an enum type
Enum types and advanced features
- Create enums with constructors and methods
- Use enums in various contexts
Develop code that declares, implements and/or extends interfaces and use the @Override annotation
Interface implementation and @Override
- Declare and implement interfaces
- Use @Override annotation correctly
Create and use Lambda expressions
Lambda expression syntax and usage
- Write lambda expressions correctly
- Understand functional interface requirements for lambdas
3
Generics and Collections
Create and use a generic class
Generic class definition and instantiation
- Create generic classes
- Understand type parameter constraints
Create and use ArrayList, TreeSet, TreeMap, and ArrayDeque objects
Collections Framework core classes
- Use collection classes effectively
- Understand collection behavior and performance
Use java.util.Comparator and java.lang.Comparable interfaces
Comparison and sorting interfaces
- Implement comparison interfaces
- Sort collections using comparators
Collections Streams and Filters
Stream operations on collections
- Create and use streams
- Filter collections with streams
Iterate using forEach methods of Streams and List
forEach iteration
- Use forEach for iteration
- Understand internal iteration concepts
Describe Stream interface and Stream pipeline
Stream API architecture
- Understand Stream API design
- Build efficient stream pipelines
Filter a collection by using lambda expressions
Lambda-based filtering
- Filter collections using lambdas
- Create complex filtering logic
Use method references with Streams
Method reference types and usage
- Use method references with streams
- Understand method reference types
4
Lambda Built-in Functional Interfaces
Use the built-in interfaces included in the java.util.function package such as Predicate, Consumer, Function, and Supplier
Core functional interfaces
- Use Predicate, Consumer, Function, and Supplier
- Understand functional interface purposes
Develop code that uses primitive versions of functional interfaces
Primitive specializations
- Use primitive functional interfaces
- Understand boxing overhead
Develop code that uses binary versions of functional interfaces
Binary functional interfaces
- Use binary functional interfaces
- Apply two-parameter operations
Develop code that uses the UnaryOperator interface
UnaryOperator and specializations
- Use UnaryOperator interface
- Understand operator interfaces
5
Java Stream API
Develop code to extract data from an object using peek() and map() methods including primitive versions of the map() method
Stream transformation operations
- Transform stream elements with map
- Use peek for inspection
Search for data by using search methods of the Stream classes including findFirst, findAny, anyMatch, allMatch, noneMatch
Stream search and match operations
- Use stream search methods
- Apply match predicates effectively
Develop code that uses the Optional class
Optional handling and operations
- Use Optional class effectively
- Handle absent values safely
Develop code that uses Stream data methods and calculation methods
Stream aggregation and statistics
- Perform calculations on streams
- Use aggregation operations
Sort a collection using Stream API
Stream sorting operations
- Sort collections using streams
- Apply custom sorting logic
Save results to a collection using the collect method and group/partition data using the Collectors class
Collectors and grouping operations
- Collect stream results
- Group and partition data effectively
Use flatMap() methods in the Stream API
FlatMap operation
- Use flatMap for nested structures
- Understand flattening operations
6
Exceptions and Assertions
Use try-catch and throw statements
Exception handling basics
- Handle exceptions correctly
- Throw exceptions appropriately
Use catch, multi-catch, and finally clauses
Advanced exception handling
- Use multi-catch effectively
- Understand finally block guarantees
Use Autoclose resources with a try-with-resources statement
Try-with-resources
- Use try-with-resources for resource management
- Understand automatic resource closing
Create custom exceptions and Auto-closeable resources
Custom exception and resource classes
- Create custom exception classes
- Implement AutoCloseable resources
Test invariants by using assertions
Assertion usage
- Use assertions for invariant testing
- Understand assertion best practices
7
Use Java SE 8 Date/Time API
Create and manage date-based and time-based events including a combination of date and time into a single object using LocalDate, LocalTime, LocalDateTime, Instant, Period, and Duration
Date and time creation
- Create and manipulate date/time objects
- Use Period and Duration for time intervals
Work with dates and times across timezones and manage changes resulting from daylight savings including Format date and times values
Timezone and formatting
- Handle timezones correctly
- Format dates and times
Define and create and manage date-based and time-based events using Instant, Period, Duration, and TemporalUnit
Temporal operations
- Perform date/time calculations
- Use temporal units effectively
8
Java I/O Fundamentals
Read and write data from the console
Console I/O operations
- Read from and write to console
- Use Console class for secure input
Use BufferedReader, BufferedWriter, File, FileReader, FileWriter, FileInputStream, FileOutputStream, ObjectOutputStream, ObjectInputStream, and PrintWriter in the java.io package
Java I/O classes
- Use various I/O classes
- Understand stream types and serialization
9
Java File I/O (NIO.2)
Use Path interface to operate on file and directory paths
Path operations
- Use Path interface effectively
- Manipulate file paths
Use Files class to check, read, delete, copy, move, manage metadata of a file or directory
Files class operations
- Perform file operations with Files class
- Manage file metadata
Use Stream API with NIO.2
NIO.2 and Stream integration
- Use Stream API with NIO.2
- Process files efficiently with streams
10
Java Concurrency
Create worker threads using Runnable, Callable and use an ExecutorService to concurrently execute tasks
Thread creation and execution
- Create and execute threads
- Use ExecutorService for task management
Identify potential threading problems among deadlock, starvation, livelock, and race conditions
Concurrency problems
- Identify concurrency problems
- Understand threading issues
Use synchronized keyword and java.util.concurrent.atomic package to control the order of thread execution
Thread synchronization
- Synchronize threads correctly
- Use atomic operations
Use java.util.concurrent collections and classes including CyclicBarrier and CopyOnWriteArrayList
Concurrent collections
- Use concurrent collections
- Apply synchronization aids
Use parallel Fork/Join Framework
Fork/Join framework
- Use Fork/Join framework
- Implement parallel algorithms
Use parallel Streams including reduction, decomposition, merging processes, pipelines and performance
Parallel streams
- Use parallel streams effectively
- Understand parallel stream performance
11
Building Database Applications with JDBC
Describe the interfaces that make up the core of the JDBC API including the Driver, Connection, Statement, and ResultSet interfaces and their relationship to provider implementations
JDBC core interfaces
- Understand JDBC architecture
- Know core JDBC interfaces
Identify the components required to connect to a database using the DriverManager class including the JDBC URL
Database connection
- Connect to databases using JDBC
- Understand JDBC URL format
Submit queries and read results from the database including creating statements, returning result sets, iterating through the results, and properly closing result sets, statements, and connections
JDBC operations
- Execute database queries
- Process query results
- Manage JDBC resources properly
12
Localization
Read and set the locale by using the Locale object
Locale management
- Create and use Locale objects
- Manage application locale
Create and read a Properties file
Properties file handling
- Create and read properties files
- Use Properties class
Build a resource bundle for each locale and load a resource bundle in an application
Resource bundles
- Create resource bundles for localization
- Load and use resource bundles
How do I earn this certification?
Passing 1Z0-809 earns the Oracle Certified Professional, Java SE 8 Programmer certification. It sits in the Java SE Programming track.
Current Level Exams
Next Level Options
- 1Z0-817 - Java SE 11 Upgrade Single upgrade exam for existing Java 8 OCP holders • Upgrade from Java 8 OCP to Java 11 OCP
- 1Z0-829 - Java SE 17 DeveloperLatest Java certification (as of 2024) • Move to latest LTS Java version
Alternative Paths
- 1Z0-819 - Java SE 11 DeveloperFor those starting fresh, 1Z0-819 is a single exam vs. two exams for Java 8 path • Alternative newer Java version - single exam combines Associate and Professional levels
- 1Z0-829 - Java SE 17 DeveloperRecommended for new learners to start with latest Java version • Latest LTS version of Java with modern features
Practice with Precision
The PlanetCert Simulator mirrors the real exam environment with authentic questions and timed pressure.
How to study for this exam?
The most effective way to prepare for 1Z0-809 is by using the PlanetCert Simulator to practice questions and review detailed explanations.
What's changed on this exam?
Current Status
- ACTIVE
- Last content update: Unknown - Oracle does not publish specific exam version dates
Updates
- Java SE 8 Long Term Support (LTS) Java SE 8 Java 8 remains relevant for enterprise applications still running on this LTS version • Release date: 2014-03-18
- Lambda Expressions
- Stream API
- Date/Time API (java.time)
Who should take this exam?
This exam is typically taken by Java Programmers and Software Developers.
Exam Code: 1Z0-808; Exam Name: Java SE 8 Programmer I; Certification: Oracle Certified Associate (OCA), Java SE 8 Programmer; Note: Must pass 1Z0-808 before taking 1Z0-809
- Solid understanding of Java fundamentals
- Experience with Java SE 8 features
- Hands-on Java programming experience
- Completion of Java SE 8 training courses