Java Pdf Notes Download

[Charise Zelnick]

Whencoding in C# I have always found the tag remarks very useful for providing notes about the implementation of a class or method, or to give information about the theory of what I was implementing. I am now using Java but I can't find an appropriate JavaDoc tag for this. Maybe in Java you accomplish this in a different manner, does anybody know?

As far as I know, there isn't any dedicated Javadoc tag for notes or remarks. Generally, the first sentence of Javadoc should give a brief description of the class/method/field. Then the full description should follow. And if you want to include any notes, a specialized paragraph with a "Note:" prepended should suffice.

This is where we say what it means to be a valid default implementation (or an overridable implementation in a class), such as throws UOE. Similarly this is where we'd describe what the default for putIfAbsent does. It is from this box that the would-be-implementer gets enough information to make a sensible decision as to whether or not to override.

Informative notes about the implementation, such as performance characteristics that are specific to the implementation in this class in this JDK in this version, and might change. These things are allowed to vary across platforms, vendors and versions.

So the new Javadoc tags are meant to categorize the information given in a comment. It distinguishes between the specification of the method's, class's, behavior (which is relevant for all users of the API - this is the "regular" comment and would be @apiSpec if it existed) and other, more ephemeral or less universally useful documentation. More concretely, an API user can not rely on anything written in @implSpec or @implNote, because these tags are concerned with this implementation of the method, saying nothing about overriding implementations.

For all release notes combined on a single page, see the Consolidated JDK 22 Release Notes. That page is dynamically generated from all of the JDK 22 release notes. Loading it takes longer than loading the individual release note pages of each release.

For all release notes combined on a single page, see the Consolidated JDK 21 Release Notes. That page is dynamically generated from all of the JDK 21 release notes. Loading it takes longer than loading the individual release note pages of each release.

Annex 2: An annotated API specification showing the exact differences relative to Java SE 9. Informative background for these changes may be found in the list of approved Change Specification Requests for this release.

Annex 3: Java SE 10 Editions of The Java Language Specification and The Java Virtual Machine Specification. The Java SE 10 Editions contain all corrections and clarifications made since the Java SE 9 Editions, as well as additions for new features.

The descriptions on this Release Note page might also identify potential compatibility issues that you could encounter when migrating to JDK 10. The Kinds of Compatibility page on the OpenJDK wiki identifies three types of potential compatibility issues for Java programs used in these descriptions:

Several new APIs have been added that facilitate the creation of unmodifiable collections. The List.copyOf, Set.copyOf, and Map.copyOf methods create new collection instances from existing instances. New methods toUnmodifiableList, toUnmodifiableSet, and toUnmodifiableMap have been added to the Collectors class in the Stream package. These allow the elements of a Stream to be collected into an unmodifiable collection.

A new system property jdk.disableLastUsageTracking has been introduced to disable JRE last usage tracking for a running VM. This property can be set in the command line by using either -Djdk.disableLastUsageTracking=true or -Djdk.disableLastUsageTracking. With this system property set, JRE last usage tracking will be disabled regardless of the com.oracle.usagetracker.track.last.usage property value set in usagetracker.properties.

com.sun.management.jmxremote.password.toHashes property is set to true in the management.properties file. The password file is writable. The system security policy allows writing into the password file if a security manager is configured.

In order to change the password for a role, replace the hashed password entry with a new clear-text password or a new hashed password. If the new password is in the clear, it will be replaced with its hash when a new login attempt is made.

In order to prevent inadvertent edits to the password file in a production environment, it is recommended that a read-only hashed password file be deployed. The hashed entries for clear passwords can be generated in advance by running the JMX agent.

It is recommended that the password file not be edited while the agent is running. Edits could be lost if a client connection triggers the hashing of the password file at the same time that the file is externally modified. The integrity of the file is guaranteed, but any external edits made to the file during the short period between the time that the agent reads the file and the time that it writes it back might be lost.

Applications that either explicitly or implicitly call org.omg.CORBA.ORB.string_to_object, and wish to ensure the integrity of the IDL stub type involved in the ORB::string_to_object call flow, should specify additional IDL stub type checking. This is an "opt in" feature and is not enabled by default.

Specifying the security property com.sun.CORBA.ORBIorTypeCheckRegistryFilter located in the file conf/security/java.security in Java SE 9 or in jre/lib/security/java.security in Java SE 8 and earlier.

Specifying the system property com.sun.CORBA.ORBIorTypeCheckRegistryFilter with the list of classes. If the system property is set, its value overrides the corresponding property defined in the java.security configuration.

If the com.sun.CORBA.ORBIorTypeCheckRegistryFilter property is not set, the type checking is only performed against a set of class names of the IDL interface types corresponding to the built-in IDL stub classes.

Improves G1 worst-case latencies by making the full GC parallel. The G1 garbage collector is designed to avoid full collections, but when the concurrent collections can't reclaim memory fast enough a fall back full GC will occur. The old implementation of the full GC for G1 used a single threaded mark-sweep-compact algorithm. With JEP 307 the full GC has been parallelized and now use the same amount of parallel worker threads as the young and mixed collections.

The cacerts keystore of the OpenJDK 9 binary for Linux x64 has been populated by JEP 319: Root Certificates [1] with a set of root certificates issued by the CAs of Oracle's Java SE Root CA Program. This addresses the problem of the empty cacerts keystore in the OpenJDK 9 binary for Linux x64. The empty cacerts keystore had prevented TLS connections from being established because Trusted Root Certificate Authorities were not installed. As a workaround for OpenJDK 9 binaries, users had to set the javax.net.ssl.trustStore System Property to use a different keystore.

The JDK SunJSSE implementation now supports the TLS FFDHE mechanisms defined in RFC 7919. If a server cannot process the supported_groups TLS extension or the named groups in the extension, applications can either customize the supported group names with jdk.tls.namedGroups, or turn off the FFDHE mechanisms by setting the System Property jsse.enableFFDHEExtension to false.

Support has been added for the TLS session hash and extended master secret extension (RFC 7627) in JDK JSSE provider. Note that in general, a server certificate change is restricted if endpoint identification is not enabled and the previous handshake is a session-resumption abbreviated initial handshake, unless the identities represented by both certificates can be regarded as the same. However, if the extension is enabled or negotiated, the server certificate changing restriction is not necessary and will be discarded accordingly. In case of compatibility issues, an application may disable negotiation of this extension by setting the System Property jdk.tls.useExtendedMasterSecret to false in the JDK. By setting the System Property jdk.tls.allowLegacyResumption to false, an application can reject abbreviated handshaking when the session hash and extended master secret extension are not negotiated. By setting the System Property jdk.tls.allowLegacyMasterSecret to false, an application can reject connections that do not support the session hash and extended master secret extension.

Declaring the iterator variable outside of the for loop allows a null to be assigned to it as soon as it is no longer used. This makes it accessible to the GC, which can then get rid of the unused memory. Something similar is done for the case when the expression in the enhanced for loop is an array.

A new javadoc command-line option, --add-stylesheet, has been added to the javadoc tool. The new --add-stylesheet option provides support for the use of multiple stylesheets in the generated documentation. The existing -stylesheetfile option now has an alias, --main-stylesheet, to help distinguish the main stylesheet from any additional stylesheets. For more details, see the javadoc section in the Tools Reference document.

A new option --overridden-methods=value, has been added to the javadoc tool. Many classes override inherited methods without changing the specification. The --overridden-methods=value option can be used to group these methods with other inherited methods, instead of documenting them in detail with the other methods declared in the class. For more details, see the javadoc section in the Tools Reference document.

A new inline tag, @summary ..., has been added to explicitly specify the text used as the summary of the API description. By default, the summary of an API description is inferred from the first sentence. This is determined by using either a simple algorithm or java.text.BreakIterator. However, the heuristics for this are not always correct and can lead to an incorrect determination of the end of the first sentence. The new tag enables the API summary text to be explicitly set instead of inferred. Please refer to Documentation Comment Specification for the Standard Doclet.

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