What does the arrow operator, ‘->’, do in Java?

That’s part of the syntax of the new lambda expressions, to be introduced in Java 8. There are a couple of online tutorials to get the hang of it, here’s a link to one. Basically, the -> separates the parameters (left-side) from the implementation (right side).

The general syntax for using lambda expressions is

(Parameters) -> { Body } where the -> separates parameters and lambda expression body.

The parameters are enclosed in parentheses which is the same way as for methods and the lambda expression body is a block of code enclosed in braces.

Related Posts:

  1. Error:java: javacTask: source release 8 requires target release 1.8
  2. Java “lambda expressions not supported at this language level”
  3. IntelliJ: Error:java: error: release version 5 not supported
  4. Exception in thread “main” java.lang.ClassNotFoundException:
  5. Java 8 Iterable.forEach() vs foreach loop
  6. What’s the difference between map() and flatMap() methods in Java 8?
  7. Lombok and Maven
  8. typeof in Java 8
  9. Package name does not correspond to the file path – IntelliJ
  10. Error: Could not find or load main class in intelliJ IDE
  11. How to install Java 8 on Mac
  12. :: (double colon) operator in Java 8
  13. java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing in Intellij
  14. What are .iml files in Android Studio?
  15. LocalDate to java.util.Date and vice versa simplest conversion?
  16. Java file outside of source root intelliJ
  17. unused import statement for used ones in IntelliJ IDEA
  18. Range of valid character for a base 64 encoding
  19. Error: JavaFX runtime components are missing, and are required to run this application with JDK 11
  20. Reason for the exception java.lang.VerifyError: Bad type on operand stack
  21. Where to get the tools.jar to use with the Java 8 jdk early release
  22. Converting between java.time.LocalDateTime and java.util.Date
  23. How to fix “unsupported class file major version 60” in IntelliJ?
  24. intellij incorrectly saying no beans of type found for autowired repository
  25. JAVA_HOME should point to a JDK not a JRE
  26. IDEA: javac: source release 1.7 requires target release 1.7
  27. Eclipse error: indirectly referenced from required .class files?
  28. IntelliJ – Can’t start – “JAVA_HOME does not point to a valid JVM installation”
  29. Creating Jar with Intellij 2016 – No main manifest attribute
  30. Failed to create a child event loop
  31. Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project
  32. How to convert an Instant to a date format?
  33. Error: Module not specified (IntelliJ IDEA)
  34. Invalid signature file digest for Manifest main attributes exception while trying to run jar file
  35. What is the best Java email address validation method?
  36. Using JavaFX in JRE 8, “Access restriction” error
  37. Intellij – Unable to use newer Java 8 classes – Error : “Usage of API documented as @since 1.6+..”
  38. “Cannot start compilation: the output path is not specified for module…”
  39. What is the purpose of the default keyword in Java?
  40. intellij idea – Error: java: invalid source release 1.9
  41. String index out of bounds exception java
  42. Issue installing Netbeans in Windows 10: Java SE Development Kit (JDK) was not found on this computer
  43. Class JavaLaunchHelper is implemented in two places
  44. IntelliJ IDEA “The selected directory is not a valid home for JDK”
  45. What does Java option -Xmx stand for? [duplicate]
  46. How do I convert a String to an int in Java?
  47. What does Java option -Xmx stand for? [duplicate]
  48. Is there an invisible character that is not regarded as whitespace?
  49. Problem with gif with transparent background
  50. Finding white rectangle in an image
  51. 1000 * 60 * 60 * 24 * 30 results in a negative number [duplicate]
  52. How to convert nanoseconds to seconds using the TimeUnit enum?
  53. Search for words with telephone numbers from 2-3-4 tree
  54. Using or ‘|’ in regex [duplicate]
  55. How to format strings in Java
  56. What is the difference between x86 and x64
  57. && (AND) and || (OR) in IF statements
  58. How to use the toString method in Java?
  59. What is a NullPointerException, and how do I fix it?
  60. What exactly is Apache Camel?
  61. Unable to find valid certification path to requested target – error even after cert imported
  62. Unable to find valid certification path to requested target – error even after cert imported
  63. What is the equivalent of the C++ Pair in Java?
  64. Java – Convert integer to string [duplicate]
  65. Getting random numbers in Java [duplicate]
  66. What is an instance variable in Java?
  67. javac is not recognized as an internal or external command, operable program or batch file [closed]
  68. javac is not recognized as an internal or external command, operable program or batch file [closed]
  69. Java: “error: cannot find symbol”
  70. How does the Java ‘for each’ loop work?
  71. Which is the difference between Long.valueOf(0) and 0L in Java?
  72. What is a StackOverflowError?
  73. What are the differences between a HashMap and a Hashtable in Java?
  74. Use of “instanceof” in Java [duplicate]
  75. How to use Collections.sort() in Java?
  76. How to uninstall Eclipse?
  77. Is GNU’s Java Compiler (GCJ) dead? [closed]
  78. How does System.out.print() work?
  79. How do I “decompile” Java class files? [closed]
  80. How do I determine whether an array contains a particular value in Java?
  81. How to initialize an array in Java?
  82. How does the Java ‘for each’ loop work?
  83. Initialize part of an array in java
  84. How can I solve Exception in thread “main” java.lang.NullPointerException error [duplicate]
  85. How to split a string in Java
  86. What does “Could not find or load main class” mean?
  87. What does “Could not find or load main class” mean?
  88. Why am I getting a NoClassDefFoundError in Java?
  89. How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterating it? [duplicate]
  90. Eclipse/Maven error: “No compiler is provided in this environment”
  91. How do I compare strings in Java?
  92. Is Java “pass-by-reference” or “pass-by-value”?
  93. What is reflection and why is it useful?
  94. Implementing UML diagram to Java [closed]
  95. How to round a number to n decimal places in Java
  96. Using Pairs or 2-tuples in Java [duplicate]
  97. How do I create a file and write to it?
  98. Could not reserve enough space for object heap
  99. Difference between java.exe and javaw.exe
  100. When to use LinkedList over ArrayList in Java?

Leave a Comment

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)