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Java / Java8 streams

What are the Java8 features?

Java 8 provides the following features:

  • DateTime API,
  • Lambda expressions,
  • Method references,
  • Functional interfaces,
  • Stream API,
  • Base64 Encode Decode,
  • Default and Static methods in interface,
  • Optional class,
  • Collectors class,
  • ForEach() method in Iterable interface ,
  • Nashorn JavaScript Engine,
  • Parallel Array Sorting,
  • Type and Repating Annotations,
  • IO and ConcurrencyEnhancements,
  • JDBC Enhancements etc.

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More Related questions...

Write a Java8 program to remove null from a stream. What is a stream in Java8? Explain: IllegalStateException, stream has already been operated upon or closed. How do I resolve IllegalStateException when Stream is reused? Can you explain what is default method in Java 8? How to override equals method in Java8? What type of variable be accessed in a lambda expression? Is forEach a terminal operation? Types of stream operations. Types of intermediate operations in Stream. Explain stream pipeline and its components. Differences Between Aggregate Operations such as forEach and Iterators. What are reduction operations? Why lambda expression is needed? Explain limit and skip methods in Java8 streams. One programming question related to Java streams. I have an Array of Employees object (includes empName, sex, age, city). Can you write a Java program using Java streams concepts to find the number of Employees in each City? For example, Employees in Mumbai: 35 like that. Thanks in Advance. Explain Java8 Collectors partitioningBy method. How do I pass custom message for the exception when thrown using orElseThrow method? What is Optional class in java? What is the difference between Java8 Collections and Stream? Is Java8 stream lazy? Explain the Collectors framework in Java8. Which functional interface represents a function that accepts a double valued argument and produces an int valued result? Which functional interface represents an operation that accepts a single int valued argument and returns no result? How do you sort a list of strings using Java 8 lambda expression? Difference between Collection and Stream in Java 8. What is a Predicate interface? Difference between Java interface (normal) and functional interface. Difference between the findFirst() and findAny() method. What is a filter() method in Java 8? Difference between the old and new Date Time API in Java 8. What are the Java8 features? Difference between map and flatmap in Java. Can you use the standard Java Ternary Operator in Reactive Code? Difference between distinct and distinctUntilChanged in RxJava.
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