Bootstrap ClassLoader称为启动加载器,是Java类中加载层次最顶层的类加载器,负责加载JDK中的核心类库,如rt.jar,resources.jar,charsets.jar等。bootstrap classloader由c++编写,在java中是无法访问的。既然无法访问,我们就无法通过反射等方法去获取系统核心包下包含的类。 访问jar包 通过classloader获取加载的package,...
}/** 取得某一类所在包的所有类名 不含迭代*/publicstaticString[] getPackageAllClassName(String classLocation, String packageName){//将packageName分解String[] packagePathSplit = packageName.split("[.]"); String realClassLocation=classLocation;intpackageLength =packagePathSplit.length;for(inti = 0;...
The system class loader loads all the classes found in the classpath. This happens during the early initialization of the JVM: public class AccessingAllClassesInPackage { public Set<Class> findAllClassesUsingClassLoader(String packageName) { InputStream stream = ClassLoader.getSystemClassLoader() ...
Class represented by myClass: class Test Package of myClass: null 示例2: // Java program to demonstrategetPackage() methodpublicclassTest{publicstaticvoidmain(String[] args)throwsClassNotFoundException{// returns the Class objectClass myClass = Class.forName("java.lang.String");// Get the pac...
packagecom.test;publicclassMySession{publicstaticfinal ThreadLocal<MyDao>session=newInheritableThreadLocal<MyDao>();}publicclassMyDao{publicstaticLog2ContextgetInstance(){MyDao myDao=null;// 创建当前线程的myDao对象myDao=MySession.session.get();if(myDao==null){myDao=newMyDao();MySession.session...
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1packageorg.javatop.net.ip;23importjava.net.InetAddress;4importjava.net.UnknownHostException;56/** 7 * InetAddress用来代表IP地址 一个InetAddress对象代表一个IP地址 9 * @author Leo 10 * 11 */12publicclassTestInetAddress{1314publicstaticvoidmain(String[]args)throws UnknownHostException{15//如何创建...
java.lang.Class类的getPackageName()方法用于获取此实体的包名称。该实体可以是类,数组,接口等。该方法以String形式返回此实体的包名称。 用法: public StringgetPackageName() 参数:此方法不接受任何参数。 返回值:此方法以String形式返回此实体的包名称。
Java documentation forjava.lang.Package.getAnnotation(java.lang.Class<A>). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. ...
一、过去的Java框架 在2000年代初期，Java企业级开发中三大框架是：Struts、Spring 和Hibernate。Struts：...