Java 12

version: 12 Release date: 2019-03-19 EOL date: 2019-09-17 bytecode: 56.0

Documentation: notes , vm , lang , api SCM: hg

Distro	Vendor	License	Platforms
AdoptOpenJDK	AdoptOpenJDK	GPLv2+CE	aix-ppc64 linux-arm32 linux-arm64 linux-ppc64le linux-s390x linux-x64 macos-x64 windows-x86 windows-x64
Azul Zulu Builds of OpenJDK 12	Azul Systems	GPLv2+CE	alpine-x64 linux-x86 linux-x64 macos-x64 windows-x86 windows-x64
Liberica	BellSoft	GPLv2+CE	alpine-x64 linux-arm32 linux-arm64 linux-ppc64le linux-x86 linux-x64 macos-x64 solaris-sparcv9 solaris-x64 windows-x86 windows-x64
Oracle JDK 12	Oracle	Commercial	linux-x64 macos-x64 windows-x64
Red Hat build of OpenJDK 12	Red Hat	GPLv2+CE	windows-x64
SapMachine 12	SAP	GPLv2+CE	linux-ppc64 linux-ppc64le linux-x64 macos-x64 windows-x64

Technology Compatibility Kit

New Features

JVM

Shenandoah GC ( JEP 189 )

Language

Switch Expressions Preview ( JEP 325 )

API

JVM Constants ( JEP 334 )

New APIs

Compare to Java:

base: version: 12 build 12.0.2+10

target: version: 11 build 11.0.15+10

base: version: 12 build 12.0.2+10

target: version: 10 build 10.0.2

base: version: 12 build 12.0.2+10

target: version: 9 build 9.0.4

m
java.activation

removed
m
java.base
- p
  java.io
  - c
    ByteArrayInputStream
    - m
      readAllBytes()
      
      added
    - m
      readNBytes(byte[], int, int)
      
      added
    - m
      transferTo(OutputStream)
      
      added
  - c
    ByteArrayOutputStream
    - m
      toString(Charset)
      
      added
    - m
      writeBytes(byte[])
      
      added
  - c
    FileInputStream
    - m
      finalize()
      
      removed
  - c
    FileOutputStream
    - m
      finalize()
      
      removed
  - c
    FileReader
    - m
      FileReader(File, Charset)
      
      added
    - m
      FileReader(String, Charset)
      
      added
  - c
    FileWriter
    - m
      FileWriter(File, Charset)
      
      added
    - m
      FileWriter(File, Charset, boolean)
      
      added
    - m
      FileWriter(String, Charset)
      
      added
    - m
      FileWriter(String, Charset, boolean)
      
      added
  - c
    InputStream
    - m
      nullInputStream()
      
      added
    - m
      readNBytes(int)
      
      added
    - m
      skipNBytes(long)
      
      added
  - c
    OutputStream
    - m
      nullOutputStream()
      
      added
  - c
    PrintStream
    - m
      PrintStream(File, Charset)
      
      added
    - m
      PrintStream(OutputStream, boolean, Charset)
      
      added
    - m
      PrintStream(String, Charset)
      
      added
  - c
    PrintWriter
    - m
      PrintWriter(File, Charset)
      
      added
    - m
      PrintWriter(OutputStream, boolean, Charset)
      
      added
    - m
      PrintWriter(String, Charset)
      
      added
  - c
    Reader
    - m
      nullReader()
      
      added
    - m
      transferTo(Writer)
      
      added
  - c
    Writer
    - m
      nullWriter()
      
      added
- p
  java.lang.constant
  
  added
- p
  java.lang.invoke
  - c
    ClassSpecializer.Factory
    
    added
  - c
    ClassSpecializer.SpeciesData
    
    added
  - c
    ConstantBootstraps
    
    added
  - c
    MethodHandle
    
    implements Constable
    - m
      describeConstable()
      
      added
  - c
    MethodType
    
    implements Constable
    
    implements TypeDescriptor.OfMethod
    - m
      describeConstable()
      
      added
    - m
      descriptorString()
      
      added
    - m
      lastParameterType()
      
      added
  - c
    VarHandle.VarHandleDesc
    
    added
  - c
    VarHandle
    
    implements Constable
    - m
      describeConstable()
      
      added
    - m
      toString()
      
      added
  - i
    TypeDescriptor.OfField
    
    added
  - i
    TypeDescriptor.OfMethod
    
    added
  - i
    TypeDescriptor
    
    added
- p
  java.lang.ref
  - c
    Reference
    - m
      clone()
      
      added

Java Version Almanac

Java versions:

Java 12

New Features

JVM

Language

API

New APIs