This document summarizes features and enhancements in Java SE 8 and in JDK 8, Oracle's implementation of Java SE 8. Click the component name for a more detailed description of the enhancements for that component
包含関係の階層については、「The Java Tutorial」の「Swing Components and the Containment Hierarchy」を参照してください。 JComponentクラスは次の機能を提供します。 Swingアーキテクチャを使用する、標準コンポーネントおよびカスタム・コンポーネント両方の基底クラス。 プログラマが指定、また...
Subclasses of Component and Container, other than the ones defined in this package like Button or Scrollbar, are lightweight. All of the Swing components are lightweights. This method will always return false if this component is not displayable because it is impossible to determine the weight...
Two types of operations are available injava.io.file.Path. First, syntactic types of operations allow developers to, among other things, manipulate paths, get a parent directory, extract path components, and iterate over components of the path. A second type of file operation uses the path to...
(1) java基类new Class("xxx")需要修改为Class.valueOf("xxx") new Long("xx"),new Integer("xxx"),new Byte("xx"),new Short("") 这些都要修改为对应的valueOf("xxx")。 jdk这么做,主要是出于性能考虑,尤其针对Integer。 (2) Class.newInstance() ...
JRE 8 provides the libraries, the Java Virtual Machine (JVM), and other components to run applets and applications written in the Java programming language. Note that the JRE includes components not required by the Java SE specification, including both standard and non-standard Java components.❞...
tgz \ --directory "$JAVA_HOME" \ --strip-components 1 \ --no-same-owner \ ; \ rm openjdk.tgz*; \ \ rm -rf "$JAVA_HOME/jre/lib/security/cacerts"; \ # see "update-ca-trust" script which creates/maintains this cacerts bundle ln -sT /etc/pki/ca-trust/extracted/java/cacerts "...
腾讯KonaJDK是OpenJDK的发行版,并且针对大数据,机器学习和云计算等场景进行了独特的优化,在高性能及安全性方面多有建树。腾讯KonaJDK团队拥有多位OpenJDK Reviewer,Committer和Author,在国内JDK团队中首屈一指。而OpenJDK开源社区活跃且成熟,它的协作模式也是开源项目中的典范,无论对于初识的爱好者,还是长期的贡献者都...
Files used by the development tools. Includes tools.jar, which contains non-core classes for support of the tools and utilities in the JDK. Also includes dt.jar, the DesignTime archive of BeanInfo files that tell interactive development environments (IDE's) how to display the Java components an...
Top Components:列出大于总堆数的百分之1的报表 Component Report:分析属于同一个包或者被同一个类加载器加载的对象状况 其中最常用的就是Leak Suspects内存泄漏分析。 MAT需要单独下载安装,下载地址: https://www.eclipse.org/mat/downloads.php MAT是eclipse系的工具,类似与Jprofiler之于IDEA,但它是免费的,不像...