What Is javaws.jar in JRE (Java Runtime Environment) 8?

javaws.jar in JRE (Java Runtime Environment) 8 contains the JNLP (Java Network Launching Protocol) API and its reference implementation.

javaws.jar in JRE 8 is located in the %JRE%\lib folder. You can download Java SE 8 JDK to get the JRE 8.

JAR File Size and Download Location:

JAR file name: javaws.jar
File size: 940868 bytes
Release date: 15-Mar-2017
Target JDK version: 5
Dependency: None
Download: Java SE 8

Manifest of the JAR:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.1
Created-By: 25.131-b11 (Oracle Corporation)

List of Classes in the JAR:

com/sun/javaws/BrowserSupport
com/sun/javaws/BrowserSupportFactory
com/sun/javaws/Cache6UpgradeHelper
com/sun/javaws/CacheUpdateHelper
com/sun/javaws/CacheUtil
com/sun/javaws/ExtensionInstallHandler
com/sun/javaws/ExtensionInstallHandlerFactory
com/sun/javaws/Globals
com/sun/javaws/HtmlOptions
com/sun/javaws/IconUtil
com/sun/javaws/JAuthenticator
com/sun/javaws/JnlpxArgs
com/sun/javaws/LaunchDownload
com/sun/javaws/Launcher
com/sun/javaws/LocalInstallHandler
com/sun/javaws/LocalInstallHandlerFactory
com/sun/javaws/Main
com/sun/javaws/OperaPreferences
com/sun/javaws/OperaSupport
com/sun/javaws/WinBrowserSupport
com/sun/javaws/WinExtensionInstallHandler
com/sun/javaws/WinInstallHandler
com/sun/javaws/WinOperaSupport
com/sun/javaws/exceptions/BadFieldException
com/sun/javaws/exceptions/BadJARFileException
com/sun/javaws/exceptions/BadMimeTypeResponseException
com/sun/javaws/exceptions/BadVersionResponseException
com/sun/javaws/exceptions/CacheAccessException
com/sun/javaws/exceptions/CanceledDownloadException
com/sun/javaws/exceptions/CouldNotLoadArgumentException
com/sun/javaws/exceptions/DownloadException
com/sun/javaws/exceptions/ErrorCodeResponseException
com/sun/javaws/exceptions/ExitException
com/sun/javaws/exceptions/FailedDownloadingResourceException
com/sun/javaws/exceptions/InvalidArgumentException
com/sun/javaws/exceptions/InvalidJarDiffException
com/sun/javaws/exceptions/JNLPException
com/sun/javaws/exceptions/JNLPSigningException
com/sun/javaws/exceptions/JNLParseException
com/sun/javaws/exceptions/JRESelectException
com/sun/javaws/exceptions/JreExecException
com/sun/javaws/exceptions/LaunchDescException
com/sun/javaws/exceptions/MissingFieldException
com/sun/javaws/exceptions/MissingVersionResponseException
com/sun/javaws/exceptions/MultipleHostsException
com/sun/javaws/exceptions/NativeLibViolationException
com/sun/javaws/exceptions/NoLocalJREException
com/sun/javaws/exceptions/OfflineLaunchException
com/sun/javaws/exceptions/UnsignedAccessViolationException
com/sun/javaws/jnl/AppletDesc
com/sun/javaws/jnl/ApplicationDesc
com/sun/javaws/jnl/EmbeddedJNLPValidation
com/sun/javaws/jnl/ExtDownloadDesc
com/sun/javaws/jnl/ExtensionDesc
com/sun/javaws/jnl/IconDesc
com/sun/javaws/jnl/InformationDesc
com/sun/javaws/jnl/InstallerDesc
com/sun/javaws/jnl/JARDesc
com/sun/javaws/jnl/JARUpdater
com/sun/javaws/jnl/JREDesc
com/sun/javaws/jnl/JREMatcher
com/sun/javaws/jnl/JavaFXAppDesc
com/sun/javaws/jnl/JavaFXRuntimeDesc
com/sun/javaws/jnl/LDUpdater
com/sun/javaws/jnl/LaunchDesc
com/sun/javaws/jnl/LaunchDescFactory
com/sun/javaws/jnl/LaunchSelection
com/sun/javaws/jnl/LibraryDesc
com/sun/javaws/jnl/MatcherReturnCode
com/sun/javaws/jnl/PackageDesc
com/sun/javaws/jnl/PropertyDesc
com/sun/javaws/jnl/RContentDesc
com/sun/javaws/jnl/ResourceType
com/sun/javaws/jnl/ResourceVisitor
com/sun/javaws/jnl/ResourcesDesc
com/sun/javaws/jnl/ShortcutDesc
com/sun/javaws/jnl/UpdateDesc
com/sun/javaws/jnl/XMLFormat
com/sun/javaws/jnl/XMLUtils
com/sun/javaws/net/protocol/jar/Handler
com/sun/javaws/progress/CustomProgress2PreloaderAdapter
com/sun/javaws/progress/PreloaderDelegate
com/sun/javaws/progress/PreloaderPostEventListener
com/sun/javaws/progress/Progress
com/sun/javaws/security/AppContextUtil
com/sun/javaws/security/AppPolicy
com/sun/javaws/security/JNLPSignedResourcesHelper
com/sun/javaws/security/JavaWebStartSecurity
com/sun/javaws/security/Resource
com/sun/javaws/security/SigningInfo
com/sun/javaws/ui/ApplicationIconGenerator
com/sun/javaws/ui/CacheObject
com/sun/javaws/ui/CacheTable
com/sun/javaws/ui/CacheViewDialog
com/sun/javaws/ui/CacheViewer
com/sun/javaws/ui/JavawsSysRun
com/sun/javaws/ui/LaunchErrorDialog
com/sun/javaws/ui/SplashGenerator
com/sun/javaws/ui/SplashScreen
com/sun/javaws/ui/UpdateDialog
com/sun/javaws/util/JNLPUtils
com/sun/javaws/util/JavawsConsoleController
com/sun/javaws/util/JavawsDialogListener
com/sun/javaws/util/JfxHelper
com/sun/jnlp/ApiDialog
com/sun/jnlp/AppletAudioClip
com/sun/jnlp/AppletContainer
com/sun/jnlp/AppletContainerCallback
com/sun/jnlp/BasicServiceImpl
com/sun/jnlp/CheckServicePermission
com/sun/jnlp/ClipboardServiceImpl
com/sun/jnlp/DownloadService2Impl
com/sun/jnlp/DownloadServiceImpl
com/sun/jnlp/ExtendedServiceImpl
com/sun/jnlp/ExtendedServiceNSBImpl
com/sun/jnlp/ExtensionInstallerServiceImpl
com/sun/jnlp/FileContentsImpl
com/sun/jnlp/FileOpenServiceImpl
com/sun/jnlp/FileOpenServiceNSBImpl
com/sun/jnlp/FileSaveServiceImpl
com/sun/jnlp/FileSaveServiceNSBImpl
com/sun/jnlp/ImageCache
com/sun/jnlp/IntegrationServiceImpl
com/sun/jnlp/IntegrationServiceNSBImpl
com/sun/jnlp/JNLPCachedJarURLConnection
com/sun/jnlp/JNLPClassLoader
com/sun/jnlp/JNLPClassLoaderIf
com/sun/jnlp/JNLPClassLoaderUtil
com/sun/jnlp/JNLPRMIClassLoaderSpi
com/sun/jnlp/JNLPRandomAccessFileImpl
com/sun/jnlp/JNLPRandomAccessFileNSBImpl
com/sun/jnlp/JnlpLookupStub
com/sun/jnlp/MeteredFileOutputStream
com/sun/jnlp/MeteredFileOutputStreamNSB
com/sun/jnlp/NativeSandboxJNLPServiceImpl
com/sun/jnlp/PersistenceServiceImpl
com/sun/jnlp/PersistenceServiceNSBImpl
com/sun/jnlp/PrintServiceImpl
com/sun/jnlp/SingleInstanceServiceImpl
javax/jnlp/BasicService
javax/jnlp/ClipboardService
javax/jnlp/DownloadService
javax/jnlp/DownloadService2
javax/jnlp/DownloadServiceListener
javax/jnlp/ExtendedService
javax/jnlp/ExtensionInstallerService
javax/jnlp/FileContents
javax/jnlp/FileOpenService
javax/jnlp/FileSaveService
javax/jnlp/IntegrationService
javax/jnlp/JNLPRandomAccessFile
javax/jnlp/PersistenceService
javax/jnlp/PrintService
javax/jnlp/ServiceManager
javax/jnlp/ServiceManagerStub
javax/jnlp/SingleInstanceListener
javax/jnlp/SingleInstanceService
javax/jnlp/UnavailableServiceException

⇒Understanding and Using javaws.jar

⇒⇒FAQ for JavaWS (Java Web Start)