Java Language
- Getting started with Java Language
- Top 10 Java Errors with Solutions
- Awesome Book
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- 2D Graphics in Java
- Alternative Collections
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- Apache Commons Lang
- AppDynamics and TIBCO BusinessWorks Instrumentation for Easy Integration
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- Class - Java Reflection
- Classes and Objects
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- Splitting a string into fixed length parts
- Stack-Walking API
- Streams
- Collect Elements of a Stream into a Collection
- Collect Results of a Stream into an Array
- Concatenate Streams
- Consuming Streams
- Converting a Stream of Optional to a Stream of Values
- Converting an iterator to a stream
- Create a Map based on a Stream
- Creating a Frequency Map
- Creating a Stream
- Finding Statistics about Numerical Streams
- Finding the First Element that Matches a Predicate
- Flatten Streams with flatMap()
- Generating random Strings using Streams
- Get a Slice of a Stream
- Infinite Streams
- IntStream to String
- Joining a stream to a single String
- Parallel Stream
- Reduction with Streams
- Sort Using Stream
- Stream operations categories
- Streams of Primitives
- Using IntStream to iterate over indexes
- Using Streams
- Using Streams and Method References to Write Self-Documenting Processes
- Using Streams of Map.Entry to Preserve Initial Values after Mapping
- Using Streams to Implement Mathematical Functions
- String Tokenizer
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- StringBuilder
- Strings
- sun.misc.Unsafe
- super keyword
- The Classpath
- The Java Command - 'java' and 'javaw'
- The java.util.Objects Class
- ThreadLocal
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- Type Conversion
- Unit Testing
- Using Other Scripting Languages in Java
- Using the static keyword
- Using ThreadPoolExecutor in MultiThreaded applications.
- Varargs (Variable Argument)
- Visibility (controlling access to members of a class)
- WeakHashMap
- XJC
- XML Parsing using the JAXP APIs
- XML XPath Evaluation
- XOM - XML Object Model
Java Language Streams Collect Results of a Stream into an Array
Example
Analog to get a collection for a Stream by collect() an array can be obtained by the Stream.toArray() method:
List<String> fruits = Arrays.asList("apple", "banana", "pear", "kiwi", "orange");
String[] filteredFruits = fruits.stream()
.filter(s -> s.contains("a"))
.toArray(String[]::new);
// prints: [apple, banana, pear, orange]
System.out.println(Arrays.toString(filteredFruits));
String[]::new is a special kind of method reference: a constructor reference.
