1. package com.javabook.classloader.namespace;
  3. import com.javabook.classloader.FileSysClassLoader;
  4. import com.javabook.classloader.NetworkClassLoader;
  6. /**
  7.  * @author Summer Lu
  8.  * @email gmluyang@gmail.com
  9.  * @date 2014-8-25
  10.  *
  11.  */
  12. public class ClassFromSameClassLoaderDemo {
  14.     /**
  15.      * @param args
  16.      */
  17.     public static void main(String[] args) {
  19.         try {
  21.             // --------------------------------------------------
  22.             // File/URL            
  23.             // --------------------------------------------------
  25.             // URL
  26.             String urls = "file:\\C:\\mybin";
  28.             // File
  29.             String file = "C:\\mybin\\";
  31.             // --------------------------------------------------
  32.             // FileSysClassLoader/NetworkClassLoader            
  33.             // --------------------------------------------------
  35.             // networkClassLoader
  36.             NetworkClassLoader networkClassLoader = new NetworkClassLoader(urls);
  37.             System.out.println("networkClassLoader.getParent() ->" + networkClassLoader.getParent());
  39.             // fileSystemClassLoader
  40.             FileSysClassLoader fileSysClassLoader = new FileSysClassLoader(file);
  41.             System.out.println("fileSysClassLoader.getParent() ->" + fileSysClassLoader.getParent());
  43.             // --------------------------------------------------
  44.             // SimpleServiceLowerCaseImpl        
  45.             // --------------------------------------------------
  47.             // simpleServiceLowerCaseImpl
  48.             String simpleServiceLowerCaseImpl = "com.javabook.classloader.service.impl.SimpleServiceLowerCaseImpl";
  50.             // simpleServiceLowerCaseImplClass1
  51.             Class<?> simpleServiceLowerCaseImplClass1 = networkClassLoader.loadClass(simpleServiceLowerCaseImpl);
  53.             // simpleServiceLowerCaseImplClass2
  54.             Class<?> simpleServiceLowerCaseImplClass2 = networkClassLoader.loadClass(simpleServiceLowerCaseImpl);
  56.             System.out.println("SimpleServiceLowerCaseImpl:");
  58.             System.out.println(    simpleServiceLowerCaseImplClass1.getClassLoader() + " -> " + simpleServiceLowerCaseImplClass1.getName() );
  60.             System.out.println(    simpleServiceLowerCaseImplClass2.getClassLoader() + " -> " + simpleServiceLowerCaseImplClass2.getName() );
  62.             System.out.println( "simpleServiceLowerCaseImplClass1 == simpleServiceLowerCaseImplClass2 ? " + (simpleServiceLowerCaseImplClass1==simpleServiceLowerCaseImplClass2) );
  64.             // --------------------------------------------------
  65.             // SimpleServiceUpperCaseImpl
  66.             // --------------------------------------------------
  68.             // simpleServiceUpperCaseImpl
  69.             String simpleServiceUpperCaseImpl = "com.javabook.classloader.service.impl.SimpleServiceUpperCaseImpl";
  71.             // simpleServiceUpperCaseImplClass1
  72.             Class<?> simpleServiceUpperCaseImplClass1 = fileSysClassLoader.loadClass(simpleServiceUpperCaseImpl);
  74.             // simpleServiceUpperCaseImplClass2
  75.             Class<?> simpleServiceUpperCaseImplClass2 = fileSysClassLoader.loadClass(simpleServiceUpperCaseImpl);
  77.             System.out.println("\nSimpleServiceUpperCaseImpl:");
  79.             System.out.println(    simpleServiceUpperCaseImplClass1.getClassLoader() + " -> " + simpleServiceUpperCaseImplClass1.getName() );
  81.             System.out.println(    simpleServiceUpperCaseImplClass2.getClassLoader() + " -> " + simpleServiceUpperCaseImplClass2.getName() );
  83.             System.out.println( "simpleServiceUpperCaseImplClass1 == simpleServiceUpperCaseImplClass2 ? " + (simpleServiceUpperCaseImplClass1==simpleServiceUpperCaseImplClass2) );
  85.         } catch (Exception e) {
  86.             e.printStackTrace();
  87.         }
  88.     }
  90. }

Console

  1. networkClassLoader.getParent() ->sun.misc.Launcher$AppClassLoader@18b4aac2
  2. fileSysClassLoader.getParent() ->sun.misc.Launcher$AppClassLoader@18b4aac2
  3. SimpleServiceLowerCaseImpl:
  4. com.javabook.classloader.NetworkClassLoader@677327b6 -> com.javabook.classloader.service.impl.SimpleServiceLowerCaseImpl
  5. com.javabook.classloader.NetworkClassLoader@677327b6 -> com.javabook.classloader.service.impl.SimpleServiceLowerCaseImpl
  6. simpleServiceLowerCaseImplClass1 == simpleServiceLowerCaseImplClass2 ? true
  8. SimpleServiceUpperCaseImpl:
  9. com.javabook.classloader.FileSysClassLoader@7f31245a -> com.javabook.classloader.service.impl.SimpleServiceUpperCaseImpl
  10. com.javabook.classloader.FileSysClassLoader@7f31245a -> com.javabook.classloader.service.impl.SimpleServiceUpperCaseImpl
  11. simpleServiceUpperCaseImplClass1 == simpleServiceUpperCaseImplClass2 ? true