Class Loader


  • public class Loader
    extends java.lang.Object
    Load resources (or images) from various sources.

    Author:
    Davanum Srinivas (dims@yahoo.com).
    • Constructor Summary

      Constructors 
      Constructor Description
      Loader()  
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.net.URL getResource​(java.lang.ClassLoader loader, java.lang.String resource)
      Try to get the resource with the specified class loader
      static java.net.URL getResource​(java.lang.String resource)
      This method will search for resource in different places.
      static java.lang.ClassLoader getTCL()
      Get the Thread context class loader.
      static java.lang.Class loadClass​(java.lang.ClassLoader loader, java.lang.String clazz)
      Try the specified classloader and then fall back to the loadClass
      static java.lang.Class loadClass​(java.lang.String clazz)
      If running under JDK 1.2 load the specified class using the Thread contextClassLoader if that fails try Class.forname.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • Loader

        public Loader()
    • Method Detail

      • getResource

        public static java.net.URL getResource​(java.lang.String resource)
        This method will search for resource in different places. The rearch order is as follows:

        1. Search for resource using the thread context class loader under Java2. If that fails, search for resource using the class loader that loaded this class (Loader).

        2. Try one last time with ClassLoader.getSystemResource(resource), that is is using the system class loader in JDK 1.2 and virtual machine's built-in class loader in JDK 1.1.

        Parameters:
        resource -
        Returns:
        TODO
      • getResource

        public static java.net.URL getResource​(java.lang.ClassLoader loader,
                                               java.lang.String resource)
        Try to get the resource with the specified class loader

        Parameters:
        cl -
        clazz -
        Returns:
        Class
        Throws:
        java.lang.ClassNotFoundException
      • getTCL

        public static java.lang.ClassLoader getTCL()
                                            throws java.lang.IllegalAccessException,
                                                   java.lang.reflect.InvocationTargetException
        Get the Thread context class loader.

        Returns:
        Throws:
        java.lang.IllegalAccessException
        java.lang.reflect.InvocationTargetException
      • loadClass

        public static java.lang.Class loadClass​(java.lang.ClassLoader loader,
                                                java.lang.String clazz)
                                         throws java.lang.ClassNotFoundException
        Try the specified classloader and then fall back to the loadClass

        Parameters:
        cl -
        clazz -
        Returns:
        Class
        Throws:
        java.lang.ClassNotFoundException
      • loadClass

        public static java.lang.Class loadClass​(java.lang.String clazz)
                                         throws java.lang.ClassNotFoundException
        If running under JDK 1.2 load the specified class using the Thread contextClassLoader if that fails try Class.forname.

        Parameters:
        clazz -
        Returns:
        TODO
        Throws:
        java.lang.ClassNotFoundException