1、例1：
1 /* 2 按需加载：当你不去实例化Cat时，Cat相关类都不会被加载，即按需加载（需要时加载） 3 1、先加载父类 4 2、初始化类 5 3、类只加载一次（暂且这么认为）——缓存 6 7 加载方法：1、隐式加载 2、显式加载 8 */ 9 public class Example { 10 public static void main(String[] args) throws ClassNotFoundException { 11 System.out.println("\n准备实例化Cat"); 12 Cat cat = new Cat(); //隐式加载，这里先加载父类 13 System.out.println("Cat实例化完成"); 14 15 System.out.println("\n准备加载MyTest类"); 16 System.out.println("第一次调用Class.forname()"); 17 Class.forName("MyTest"); //显式加载类，用Class.forName("com.taobao.ju.MyTest"); 18 System.out.println("第二次调用Class.forname()"); //缓存机制：一旦一个类被载入JVM中，同一个类就不会再被载入了。 19 Class.forName("MyTest"); 20 21 System.out.println("\n准备加载MyTest2类"); //Class.forName()加载类同时 强制初始化类（初始化静态部分） 22 Class.forName("MyTest2"); 23 24 System.out.println("\n准备加载MyTest3类"); 25 ClassLoader c1 = ClassLoader.getSystemClassLoader(); 26 c1.loadClass("MyTest3"); //ClassLoader.loadClass() 该语句仅是加载MyTest3类，并不执行该类的初始化 27 System.out.println("第二次调用ClassLoader.loadClass()"); 28 c1.loadClass("MyTest3"); 29 30 System.out.println("\n程序结束\n"); 31 } 32 } 33 34 class Animal { 35 static { 36 System.out.println("I am an animal"); 37 } 38 } 39 40 class Cat extends Animal { 41 static { 42 System.out.println("I am a cat"); 43 } 44 } 45 46 class MyTest { 47 48 } 49 50 class MyTest2 { 51 static { 52 System.out.println("MyTest2的静态部分初始化"); 53 } 54 } 55 56 class MyTest3 { 57 static { 58 System.out.println("MyTest3的静态初始化"); 59 } 60 }
执行时在eclipse里面加上参数-verbose，能够显示详细的加载信息
结果如下：开始会先加载rt.jar，程序结束后加载java.lang.Shutdown等
1 [Opened C:\jdk1.6.0\jre\lib\rt.jar] 2 [Loaded java.lang.Object from C:\jdk1.6.0\jre\lib\rt.jar] 3 [Loaded java.io.Serializable from C:\jdk1.6.0\jre\lib\rt.jar] 4 [Loaded java.lang.Comparable from C:\jdk1.6.0\jre\lib\rt.jar] 5 [Loaded java.lang.CharSequence from C:\jdk1.6.0\jre\lib\rt.jar] 6 [Loaded java.lang.String from C:\jdk1.6.0\jre\lib\rt.jar] 7 [Loaded java.lang.reflect.GenericDeclaration from C:\jdk1.6.0\jre\lib\rt.jar] 8 [Loaded java.lang.reflect.Type from C:\jdk1.6.0\jre\lib\rt.jar] 9 [Loaded java.lang.reflect.AnnotatedElement from C:\jdk1.6.0\jre\lib\rt.jar] 10 [Loaded java.lang.Class from C:\jdk1.6.0\jre\lib\rt.jar] 11 [Loaded java.lang.Cloneable from C:\jdk1.6.0\jre\lib\rt.jar] 12 [Loaded java.lang.ClassLoader from C:\jdk1.6.0\jre\lib\rt.jar] 13 [Loaded java.lang.System from C:\jdk1.6.0\jre\lib\rt.jar] 14 [Loaded java.lang.Throwable from C:\jdk1.6.0\jre\lib\rt.jar] 15 [Loaded java.lang.Error from C:\jdk1.6.0\jre\lib\rt.jar] 16 [Loaded java.lang.ThreadDeath from C:\jdk1.6.0\jre\lib\rt.jar] 17 [Loaded java.lang.Exception from C:\jdk1.6.0\jre\lib\rt.jar] 18 [Loaded java.lang.RuntimeException from C:\jdk1.6.0\jre\lib\rt.jar] 19 [Loaded java.security.ProtectionDomain from C:\jdk1.6.0\jre\lib\rt.jar] 20 [Loaded java.security.AccessControlContext from C:\jdk1.6.0\jre\lib\rt.jar] 21 [Loaded java.lang.ClassNotFoundException from C:\jdk1.6.0\jre\lib\rt.jar] 22 [Loaded java.lang.LinkageError from C:\jdk1.6.0\jre\lib\rt.jar] 23 [Loaded java.lang.NoClassDefFoundError from C:\jdk1.6.0\jre\lib\rt.jar] 24 [Loaded java.lang.ClassCastException from C:\jdk1.6.0\jre\lib\rt.jar] 25 [Loaded java.lang.ArrayStoreException from C:\jdk1.6.0\jre\lib\rt.jar] 26 [Loaded java.lang.VirtualMachineError from C:\jdk1.6.0\jre\lib\rt.jar] 27 [Loaded java.lang.OutOfMemoryError from C:\jdk1.6.0\jre\lib\rt.jar] 28 [Loaded java.lang.StackOverflowError from C:\jdk1.6.0\jre\lib\rt.jar] 29 [Loaded java.lang.IllegalMonitorStateException from C:\jdk1.6.0\jre\lib\rt.jar] 30 [Loaded java.lang.ref.Reference from C:\jdk1.6.0\jre\lib\rt.jar] 31 [Loaded java.lang.ref.SoftReference from C:\jdk1.6.0\jre\lib\rt.jar] 32 [Loaded java.lang.ref.WeakReference from C:\jdk1.6.0\jre\lib\rt.jar] 33 [Loaded java.lang.ref.FinalReference from C:\jdk1.6.0\jre\lib\rt.jar] 34 [Loaded java.lang.ref.PhantomReference from C:\jdk1.6.0\jre\lib\rt.jar] 35 [Loaded java.lang.ref.Finalizer from C:\jdk1.6.0\jre\lib\rt.jar] 36 [Loaded java.lang.Runnable from C:\jdk1.6.0\jre\lib\rt.jar] 37 [Loaded java.lang.Thread from C:\jdk1.6.0\jre\lib\rt.jar] 38 [Loaded java.lang.Thread$UncaughtExceptionHandler from C:\jdk1.6.0\jre\lib\rt.jar] 39 [Loaded java.lang.ThreadGroup from C:\jdk1.6.0\jre\lib\rt.jar] 40 [Loaded java.util.Map from C:\jdk1.6.0\jre\lib\rt.jar] 41 [Loaded java.util.Dictionary from C:\jdk1.6.0\jre\lib\rt.jar] 42 [Loaded java.util.Hashtable from C:\jdk1.6.0\jre\lib\rt.jar] 43 [Loaded java.util.Properties from C:\jdk1.6.0\jre\lib\rt.jar] 44 [Loaded java.lang.reflect.AccessibleObject from C:\jdk1.6.0\jre\lib\rt.jar] 45 [Loaded java.lang.reflect.Member from C:\jdk1.6.0\jre\lib\rt.jar] 46 [Loaded java.lang.reflect.Field from C:\jdk1.6.0\jre\lib\rt.jar] 47 [Loaded java.lang.reflect.Method from C:\jdk1.6.0\jre\lib\rt.jar] 48 [Loaded java.lang.reflect.Constructor from C:\jdk1.6.0\jre\lib\rt.jar] 49 [Loaded sun.reflect.MagicAccessorImpl from C:\jdk1.6.0\jre\lib\rt.jar] 50 [Loaded sun.reflect.MethodAccessor from C:\jdk1.6.0\jre\lib\rt.jar] 51 [Loaded sun.reflect.MethodAccessorImpl from C:\jdk1.6.0\jre\lib\rt.jar] 52 [Loaded sun.reflect.ConstructorAccessor from C:\jdk1.6.0\jre\lib\rt.jar] 53 [Loaded sun.reflect.ConstructorAccessorImpl from C:\jdk1.6.0\jre\lib\rt.jar] 54 [Loaded sun.reflect.DelegatingClassLoader from C:\jdk1.6.0\jre\lib\rt.jar] 55 [Loaded sun.reflect.ConstantPool from C:\jdk1.6.0\jre\lib\rt.jar] 56 [Loaded sun.reflect.FieldAccessor from C:\jdk1.6.0\jre\lib\rt.jar] 57 [Loaded sun.reflect.FieldAccessorImpl from C:\jdk1.6.0\jre\lib\rt.jar] 58 [Loaded sun.reflect.UnsafeFieldAccessorImpl from C:\jdk1.6.0\jre\lib\rt.jar] 59 [Loaded sun.reflect.UnsafeStaticFieldAccessorImpl from C:\jdk1.6.0\jre\lib\rt.jar] 60 [Loaded java.lang.Appendable from C:\jdk1.6.0\jre\lib\rt.jar] 61 [Loaded java.lang.AbstractStringBuilder from C:\jdk1.6.0\jre\lib\rt.jar] 62 [Loaded java.lang.StringBuffer from C:\jdk1.6.0\jre\lib\rt.jar] 63 [Loaded java.lang.StringBuilder from C:\jdk1.6.0\jre\lib\rt.jar] 64 [Loaded java.lang.StackTraceElement from C:\jdk1.6.0\jre\lib\rt.jar] 65 [Loaded java.nio.Buffer from C:\jdk1.6.0\jre\lib\rt.jar] 66 [Loaded sun.misc.AtomicLong from C:\jdk1.6.0\jre\lib\rt.jar] 67 [Loaded sun.misc.AtomicLongCSImpl from C:\jdk1.6.0\jre\lib\rt.jar] 68 [Loaded sun.misc.PostVMInitHook from C:\jdk1.6.0\jre\lib\rt.jar] 69 [Loaded java.lang.Boolean from C:\jdk1.6.0\jre\lib\rt.jar] 70 [Loaded java.lang.Character from C:\jdk1.6.0\jre\lib\rt.jar] 71 [Loaded java.lang.Number from C:\jdk1.6.0\jre\lib\rt.jar] 72 [Loaded java.lang.Float from C:\jdk1.6.0\jre\lib\rt.jar] 73 [Loaded java.lang.Double from C:\jdk1.6.0\jre\lib\rt.jar] 74 [Loaded java.lang.Byte from C:\jdk1.6.0\jre\lib\rt.jar] 75 [Loaded java.lang.Short from C:\jdk1.6.0\jre\lib\rt.jar] 76 [Loaded java.lang.Integer from C:\jdk1.6.0\jre\lib\rt.jar] 77 [Loaded java.lang.Long from C:\jdk1.6.0\jre\lib\rt.jar] 78 [Loaded java.lang.NullPointerException from C:\jdk1.6.0\jre\lib\rt.jar] 79 [Loaded java.lang.ArithmeticException from C:\jdk1.6.0\jre\lib\rt.jar] 80 [Loaded java.io.ObjectStreamField from C:\jdk1.6.0\jre\lib\rt.jar] 81 [Loaded java.util.Comparator from C:\jdk1.6.0\jre\lib\rt.jar] 82 [Loaded java.lang.String$CaseInsensitiveComparator from C:\jdk1.6.0\jre\lib\rt.jar] 83 [Loaded java.security.Guard from C:\jdk1.6.0\jre\lib\rt.jar] 84 [Loaded java.security.Permission from C:\jdk1.6.0\jre\lib\rt.jar] 85 [Loaded java.security.BasicPermission from C:\jdk1.6.0\jre\lib\rt.jar] 86 [Loaded java.lang.RuntimePermission from C:\jdk1.6.0\jre\lib\rt.jar] 87 [Loaded java.util.AbstractMap from C:\jdk1.6.0\jre\lib\rt.jar] 88 [Loaded sun.misc.SoftCache from C:\jdk1.6.0\jre\lib\rt.jar] 89 [Loaded java.lang.ref.ReferenceQueue from C:\jdk1.6.0\jre\lib\rt.jar] 90 [Loaded java.lang.ref.ReferenceQueue$Null from C:\jdk1.6.0\jre\lib\rt.jar] 91 [Loaded java.lang.ref.ReferenceQueue$Lock from C:\jdk1.6.0\jre\lib\rt.jar] 92 [Loaded java.util.HashMap from C:\jdk1.6.0\jre\lib\rt.jar] 93 [Loaded java.util.Map$Entry from C:\jdk1.6.0\jre\lib\rt.jar] 94 [Loaded java.util.HashMap$Entry from C:\jdk1.6.0\jre\lib\rt.jar] 95 [Loaded java.security.AccessController from C:\jdk1.6.0\jre\lib\rt.jar] 96 [Loaded sun.misc.JavaSecurityAccess from C:\jdk1.6.0\jre\lib\rt.jar] 97 [Loaded java.security.AccessControlContext$1 from C:\jdk1.6.0\jre\lib\rt.jar] 98 [Loaded sun.misc.SharedSecrets from C:\jdk1.6.0\jre\lib\rt.jar] 99 [Loaded sun.misc.Unsafe from C:\jdk1.6.0\jre\lib\rt.jar] 100 [Loaded java.lang.IncompatibleClassChangeError from C:\jdk1.6.0\jre\lib\rt.jar] 101 [Loaded java.lang.NoSuchMethodError from C:\jdk1.6.0\jre\lib\rt.jar] 102 [Loaded sun.reflect.Reflection from C:\jdk1.6.0\jre\lib\rt.jar] 103 [Loaded java.util.Collections from C:\jdk1.6.0\jre\lib\rt.jar] 104 [Loaded java.lang.Iterable from C:\jdk1.6.0\jre\lib\rt.jar] 105 [Loaded java.util.Collection from C:\jdk1.6.0\jre\lib\rt.jar] 106 [Loaded java.util.Set from C:\jdk1.6.0\jre\lib\rt.jar] 107 [Loaded java.util.AbstractCollection from C:\jdk1.6.0\jre\lib\rt.jar] 108 [Loaded java.util.AbstractSet from C:\jdk1.6.0\jre\lib\rt.jar] 109 [Loaded java.util.Collections$EmptySet from C:\jdk1.6.0\jre\lib\rt.jar] 110 [Loaded java.util.RandomAccess from C:\jdk1.6.0\jre\lib\rt.jar] 111 [Loaded java.util.List from C:\jdk1.6.0\jre\lib\rt.jar] 112 [Loaded java.util.AbstractList from C:\jdk1.6.0\jre\lib\rt.jar] 113 [Loaded java.util.Collections$EmptyList from C:\jdk1.6.0\jre\lib\rt.jar] 114 [Loaded java.util.Collections$EmptyMap from C:\jdk1.6.0\jre\lib\rt.jar] 115 [Loaded java.util.Collections$ReverseComparator from C:\jdk1.6.0\jre\lib\rt.jar] 116 [Loaded java.util.Collections$SynchronizedMap from C:\jdk1.6.0\jre\lib\rt.jar] 117 [Loaded java.lang.reflect.ReflectPermission from C:\jdk1.6.0\jre\lib\rt.jar] 118 [Loaded java.security.PrivilegedAction from C:\jdk1.6.0\jre\lib\rt.jar] 119 [Loaded sun.reflect.ReflectionFactory$GetReflectionFactoryAction from C:\jdk1.6.0\jre\lib\rt.jar] 120 [Loaded java.util.Vector from C:\jdk1.6.0\jre\lib\rt.jar] 121 [Loaded java.util.Stack from C:\jdk1.6.0\jre\lib\rt.jar] 122 [Loaded sun.reflect.ReflectionFactory from C:\jdk1.6.0\jre\lib\rt.jar] 123 [Loaded java.lang.ref.Reference$Lock from C:\jdk1.6.0\jre\lib\rt.jar] 124 [Loaded java.lang.ref.Reference$ReferenceHandler from C:\jdk1.6.0\jre\lib\rt.jar] 125 [Loaded java.lang.ref.Finalizer$FinalizerThread from C:\jdk1.6.0\jre\lib\rt.jar] 126 [Loaded java.util.Enumeration from C:\jdk1.6.0\jre\lib\rt.jar] 127 [Loaded java.util.Hashtable$EmptyEnumerator from C:\jdk1.6.0\jre\lib\rt.jar] 128 [Loaded java.util.Iterator from C:\jdk1.6.0\jre\lib\rt.jar] 129 [Loaded java.util.Hashtable$EmptyIterator from C:\jdk1.6.0\jre\lib\rt.jar] 130 [Loaded java.util.Hashtable$Entry from C:\jdk1.6.0\jre\lib\rt.jar] 131 [Loaded java.nio.charset.Charset from C:\jdk1.6.0\jre\lib\rt.jar] 132 [Loaded java.nio.charset.spi.CharsetProvider from C:\jdk1.6.0\jre\lib\rt.jar] 133 [Loaded sun.nio.cs.FastCharsetProvider from C:\jdk1.6.0\jre\lib\rt.jar] 134 [Loaded sun.nio.cs.StandardCharsets from C:\jdk1.6.0\jre\lib\rt.jar] 135 [Loaded sun.util.PreHashedMap from C:\jdk1.6.0\jre\lib\rt.jar] 136 [Loaded sun.nio.cs.StandardCharsets$Aliases from C:\jdk1.6.0\jre\lib\rt.jar] 137 [Loaded sun.nio.cs.StandardCharsets$Classes from C:\jdk1.6.0\jre\lib\rt.jar] 138 [Loaded sun.nio.cs.StandardCharsets$Cache from C:\jdk1.6.0\jre\lib\rt.jar] 139 [Loaded java.lang.ThreadLocal from C:\jdk1.6.0\jre\lib\rt.jar] 140 [Loaded java.util.concurrent.atomic.AtomicInteger from C:\jdk1.6.0\jre\lib\rt.jar] 141 [Loaded java.lang.Class$3 from C:\jdk1.6.0\jre\lib\rt.jar] 142 [Loaded java.lang.reflect.Modifier from C:\jdk1.6.0\jre\lib\rt.jar] 143 [Loaded sun.reflect.LangReflectAccess from C:\jdk1.6.0\jre\lib\rt.jar] 144 [Loaded java.lang.reflect.ReflectAccess from C:\jdk1.6.0\jre\lib\rt.jar] 145 [Loaded java.lang.StringValue from C:\jdk1.6.0\jre\lib\rt.jar] 146 [Loaded java.util.Arrays from C:\jdk1.6.0\jre\lib\rt.jar] 147 [Loaded java.lang.Math from C:\jdk1.6.0\jre\lib\rt.jar] 148 [Loaded java.nio.charset.Charset$3 from C:\jdk1.6.0\jre\lib\rt.jar] 149 [Opened C:\jdk1.6.0\jre\lib\charsets.jar] 150 [Loaded sun.nio.cs.AbstractCharsetProvider from C:\jdk1.6.0\jre\lib\rt.jar] 151 [Loaded sun.nio.cs.ext.ExtendedCharsets from C:\jdk1.6.0\jre\lib\charsets.jar] 152 [Loaded java.lang.Class$1 from C:\jdk1.6.0\jre\lib\rt.jar] 153 [Loaded sun.reflect.ReflectionFactory$1 from C:\jdk1.6.0\jre\lib\rt.jar] 154 [Loaded sun.reflect.NativeConstructorAccessorImpl from C:\jdk1.6.0\jre\lib\rt.jar] 155 [Loaded sun.reflect.DelegatingConstructorAccessorImpl from C:\jdk1.6.0\jre\lib\rt.jar] 156 [Loaded java.util.SortedMap from C:\jdk1.6.0\jre\lib\rt.jar] 157 [Loaded java.util.NavigableMap from C:\jdk1.6.0\jre\lib\rt.jar] 158 [Loaded java.util.TreeMap from C:\jdk1.6.0\jre\lib\rt.jar] 159 [Loaded sun.misc.ASCIICaseInsensitiveComparator from C:\jdk1.6.0\jre\lib\rt.jar] 160 [Loaded java.util.TreeMap$Entry from C:\jdk1.6.0\jre\lib\rt.jar] 161 [Loaded sun.misc.VM from C:\jdk1.6.0\jre\lib\rt.jar] 162 [Loaded sun.nio.cs.ext.GBK from C:\jdk1.6.0\jre\lib\charsets.jar] 163 [Loaded java.lang.StringCoding from C:\jdk1.6.0\jre\lib\rt.jar] 164 [Loaded java.lang.ThreadLocal$ThreadLocalMap from C:\jdk1.6.0\jre\lib\rt.jar] 165 [Loaded java.lang.ThreadLocal$ThreadLocalMap$Entry from C:\jdk1.6.0\jre\lib\rt.jar] 166 [Loaded java.lang.StringCoding$StringDecoder from C:\jdk1.6.0\jre\lib\rt.jar] 167 [Loaded java.nio.charset.CharsetDecoder from C:\jdk1.6.0\jre\lib\rt.jar] 168 [Loaded sun.nio.cs.ext.DoubleByteDecoder from C:\jdk1.6.0\jre\lib\charsets.jar] 169 [Loaded sun.nio.cs.ext.GBK$Decoder from C:\jdk1.6.0\jre\lib\charsets.jar] 170 [Loaded java.nio.charset.CodingErrorAction from C:\jdk1.6.0\jre\lib\rt.jar] 171 [Loaded java.nio.ByteBuffer from C:\jdk1.6.0\jre\lib\rt.jar] 172 [Loaded java.nio.HeapByteBuffer from C:\jdk1.6.0\jre\lib\rt.jar] 173 [Loaded java.nio.Bits from C:\jdk1.6.0\jre\lib\rt.jar] 174 [Loaded sun.misc.JavaNioAccess from C:\jdk1.6.0\jre\lib\rt.jar] 175 [Loaded java.nio.Bits$1 from C:\jdk1.6.0\jre\lib\rt.jar] 176 [Loaded java.nio.ByteOrder from C:\jdk1.6.0\jre\lib\rt.jar] 177 [Loaded java.lang.Readable from C:\jdk1.6.0\jre\lib\rt.jar] 178 [Loaded java.nio.CharBuffer from C:\jdk1.6.0\jre\lib\rt.jar] 179 [Loaded java.nio.HeapCharBuffer from C:\jdk1.6.0\jre\lib\rt.jar] 180 [Loaded java.nio.charset.CoderResult from C:\jdk1.6.0\jre\lib\rt.jar] 181 [Loaded java.nio.charset.CoderResult$Cache from C:\jdk1.6.0\jre\lib\rt.jar] 182 [Loaded java.nio.charset.CoderResult$1 from C:\jdk1.6.0\jre\lib\rt.jar] 183 [Loaded java.nio.charset.CoderResult$2 from C:\jdk1.6.0\jre\lib\rt.jar] 184 [Loaded sun.misc.Version from C:\jdk1.6.0\jre\lib\rt.jar] 185 [Loaded sun.misc.JavaLangAccess from C:\jdk1.6.0\jre\lib\rt.jar] 186 [Loaded java.lang.System$2 from C:\jdk1.6.0\jre\lib\rt.jar] 187 [Loaded java.lang.Runtime from C:\jdk1.6.0\jre\lib\rt.jar] 188 [Loaded java.io.File from C:\jdk1.6.0\jre\lib\rt.jar] 189 [Loaded java.io.FileSystem from C:\jdk1.6.0\jre\lib\rt.jar] 190 [Loaded java.io.Win32FileSystem from C:\jdk1.6.0\jre\lib\rt.jar] 191 [Loaded java.io.WinNTFileSystem from C:\jdk1.6.0\jre\lib\rt.jar] 192 [Loaded java.io.ExpiringCache from C:\jdk1.6.0\jre\lib\rt.jar] 193 [Loaded java.util.LinkedHashMap from C:\jdk1.6.0\jre\lib\rt.jar] 194 [Loaded java.io.ExpiringCache$1 from C:\jdk1.6.0\jre\lib\rt.jar] 195 [Loaded java.util.LinkedHashMap$Entry from C:\jdk1.6.0\jre\lib\rt.jar] 196 [Loaded sun.security.action.GetPropertyAction from C:\jdk1.6.0\jre\lib\rt.jar] 197 [Loaded sun.jkernel.DownloadManager from C:\jdk1.6.0\jre\lib\rt.jar] 198 [Loaded sun.jkernel.DownloadManager$1 from C:\jdk1.6.0\jre\lib\rt.jar] 199 [Loaded sun.jkernel.DownloadManager$2 from C:\jdk1.6.0\jre\lib\rt.jar] 200 [Loaded java.lang.ClassLoader$3 from C:\jdk1.6.0\jre\lib\rt.jar] 201 [Loaded java.io.ExpiringCache$Entry from C:\jdk1.6.0\jre\lib\rt.jar] 202 [Loaded java.lang.ClassLoader$NativeLibrary from C:\jdk1.6.0\jre\lib\rt.jar] 203 [Loaded java.lang.StringCoding$StringEncoder from C:\jdk1.6.0\jre\lib\rt.jar] 204 [Loaded java.nio.charset.CharsetEncoder from C:\jdk1.6.0\jre\lib\rt.jar] 205 [Loaded sun.nio.cs.ext.DoubleByteEncoder from C:\jdk1.6.0\jre\lib\charsets.jar] 206 [Loaded sun.nio.cs.ext.GBK$Encoder from C:\jdk1.6.0\jre\lib\charsets.jar] 207 [Loaded sun.nio.cs.Surrogate$Parser from C:\jdk1.6.0\jre\lib\rt.jar] 208 [Loaded sun.nio.cs.Surrogate from C:\jdk1.6.0\jre\lib\rt.jar] 209 [Loaded java.io.Closeable from C:\jdk1.6.0\jre\lib\rt.jar] 210 [Loaded java.io.InputStream from C:\jdk1.6.0\jre\lib\rt.jar] 211 [Loaded java.io.FileInputStream from C:\jdk1.6.0\jre\lib\rt.jar] 212 [Loaded java.io.FileDescriptor from C:\jdk1.6.0\jre\lib\rt.jar] 213 [Loaded java.io.Flushable from C:\jdk1.6.0\jre\lib\rt.jar] 214 [Loaded java.io.OutputStream from C:\jdk1.6.0\jre\lib\rt.jar] 215 [Loaded java.io.FileOutputStream from C:\jdk1.6.0\jre\lib\rt.jar] 216 [Loaded java.io.FilterInputStream from C:\jdk1.6.0\jre\lib\rt.jar] 217 [Loaded java.io.BufferedInputStream from C:\jdk1.6.0\jre\lib\rt.jar] 218 [Loaded java.util.concurrent.atomic.AtomicReferenceFieldUpdater from C:\jdk1.6.0\jre\lib\rt.jar] 219 [Loaded java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl from C:\jdk1.6.0\jre\lib\rt.jar] 220 [Loaded sun.reflect.misc.ReflectUtil from C:\jdk1.6.0\jre\lib\rt.jar] 221 [Loaded java.io.FilterOutputStream from C:\jdk1.6.0\jre\lib\rt.jar] 222 [Loaded java.io.PrintStream from C:\jdk1.6.0\jre\lib\rt.jar] 223 [Loaded java.io.BufferedOutputStream from C:\jdk1.6.0\jre\lib\rt.jar] 224 [Loaded java.io.Writer from C:\jdk1.6.0\jre\lib\rt.jar] 225 [Loaded java.io.OutputStreamWriter from C:\jdk1.6.0\jre\lib\rt.jar] 226 [Loaded sun.nio.cs.StreamEncoder from C:\jdk1.6.0\jre\lib\rt.jar] 227 [Loaded java.io.BufferedWriter from C:\jdk1.6.0\jre\lib\rt.jar] 228 [Loaded java.lang.Terminator from C:\jdk1.6.0\jre\lib\rt.jar] 229 [Loaded sun.misc.SignalHandler from C:\jdk1.6.0\jre\lib\rt.jar] 230 [Loaded java.lang.Terminator$1 from C:\jdk1.6.0\jre\lib\rt.jar] 231 [Loaded sun.misc.Signal from C:\jdk1.6.0\jre\lib\rt.jar] 232 [Loaded sun.misc.NativeSignalHandler from C:\jdk1.6.0\jre\lib\rt.jar] 233 [Loaded sun.misc.OSEnvironment from C:\jdk1.6.0\jre\lib\rt.jar] 234 [Loaded sun.io.Win32ErrorMode from C:\jdk1.6.0\jre\lib\rt.jar] 235 [Loaded java.lang.Compiler from C:\jdk1.6.0\jre\lib\rt.jar] 236 [Loaded java.lang.Compiler$1 from C:\jdk1.6.0\jre\lib\rt.jar] 237 [Loaded sun.misc.Launcher from C:\jdk1.6.0\jre\lib\rt.jar] 238 [Loaded java.net.URLStreamHandlerFactory from C:\jdk1.6.0\jre\lib\rt.jar] 239 [Loaded sun.misc.Launcher$Factory from C:\jdk1.6.0\jre\lib\rt.jar] 240 [Loaded java.security.SecureClassLoader from C:\jdk1.6.0\jre\lib\rt.jar] 241 [Loaded java.net.URLClassLoader from C:\jdk1.6.0\jre\lib\rt.jar] 242 [Loaded sun.misc.Launcher$ExtClassLoader from C:\jdk1.6.0\jre\lib\rt.jar] 243 [Loaded sun.security.util.Debug from C:\jdk1.6.0\jre\lib\rt.jar] 244 [Loaded java.lang.Package from C:\jdk1.6.0\jre\lib\rt.jar] 245 [Loaded java.net.URL from C:\jdk1.6.0\jre\lib\rt.jar] 246 [Loaded java.security.CodeSource from C:\jdk1.6.0\jre\lib\rt.jar] 247 [Loaded java.lang.Void from C:\jdk1.6.0\jre\lib\rt.jar] 248 [Loaded java.security.cert.Certificate from C:\jdk1.6.0\jre\lib\rt.jar] 249 [Loaded java.lang.ClassFormatError from C:\jdk1.6.0\jre\lib\rt.jar] 250 [Loaded java.lang.IllegalArgumentException from C:\jdk1.6.0\jre\lib\rt.jar] 251 [Loaded java.io.IOException from C:\jdk1.6.0\jre\lib\rt.jar] 252 [Loaded sun.misc.URLClassPath from C:\jdk1.6.0\jre\lib\rt.jar] 253 [Loaded java.lang.AssertionStatusDirectives from C:\jdk1.6.0\jre\lib\rt.jar] 254 [Loaded sun.misc.JavaNetAccess from C:\jdk1.6.0\jre\lib\rt.jar] 255 [Loaded java.net.URLClassLoader$7 from C:\jdk1.6.0\jre\lib\rt.jar] 256 [Loaded java.security.PermissionCollection from C:\jdk1.6.0\jre\lib\rt.jar] 257 [Loaded java.util.StringTokenizer from C:\jdk1.6.0\jre\lib\rt.jar] 258 [Loaded java.security.PrivilegedExceptionAction from C:\jdk1.6.0\jre\lib\rt.jar] 259 [Loaded sun.misc.Launcher$ExtClassLoader$1 from C:\jdk1.6.0\jre\lib\rt.jar] 260 [Loaded sun.misc.MetaIndex from C:\jdk1.6.0\jre\lib\rt.jar] 261 [Loaded java.io.Reader from C:\jdk1.6.0\jre\lib\rt.jar] 262 [Loaded java.io.BufferedReader from C:\jdk1.6.0\jre\lib\rt.jar] 263 [Loaded java.io.InputStreamReader from C:\jdk1.6.0\jre\lib\rt.jar] 264 [Loaded java.io.FileReader from C:\jdk1.6.0\jre\lib\rt.jar] 265 [Loaded sun.nio.cs.StreamDecoder from C:\jdk1.6.0\jre\lib\rt.jar] 266 [Loaded java.util.ArrayList from C:\jdk1.6.0\jre\lib\rt.jar] 267 [Loaded java.lang.reflect.Array from C:\jdk1.6.0\jre\lib\rt.jar] 268 [Loaded java.util.Locale from C:\jdk1.6.0\jre\lib\rt.jar] 269 [Loaded java.util.concurrent.ConcurrentMap from C:\jdk1.6.0\jre\lib\rt.jar] 270 [Loaded java.util.concurrent.ConcurrentHashMap from C:\jdk1.6.0\jre\lib\rt.jar] 271 [Loaded java.util.concurrent.locks.Lock from C:\jdk1.6.0\jre\lib\rt.jar] 272 [Loaded java.util.concurrent.locks.ReentrantLock from C:\jdk1.6.0\jre\lib\rt.jar] 273 [Loaded java.util.concurrent.ConcurrentHashMap$Segment from C:\jdk1.6.0\jre\lib\rt.jar] 274 [Loaded java.util.concurrent.locks.AbstractOwnableSynchronizer from C:\jdk1.6.0\jre\lib\rt.jar] 275 [Loaded java.util.concurrent.locks.AbstractQueuedSynchronizer from C:\jdk1.6.0\jre\lib\rt.jar] 276 [Loaded java.util.concurrent.locks.ReentrantLock$Sync from C:\jdk1.6.0\jre\lib\rt.jar] 277 [Loaded java.util.concurrent.locks.ReentrantLock$NonfairSync from C:\jdk1.6.0\jre\lib\rt.jar] 278 [Loaded java.util.concurrent.locks.AbstractQueuedSynchronizer$Node from C:\jdk1.6.0\jre\lib\rt.jar] 279 [Loaded java.util.concurrent.ConcurrentHashMap$HashEntry from C:\jdk1.6.0\jre\lib\rt.jar] 280 [Loaded java.lang.CharacterDataLatin1 from C:\jdk1.6.0\jre\lib\rt.jar] 281 [Loaded java.io.ObjectStreamClass from C:\jdk1.6.0\jre\lib\rt.jar] 282 [Loaded sun.net.www.ParseUtil from C:\jdk1.6.0\jre\lib\rt.jar] 283 [Loaded java.util.BitSet from C:\jdk1.6.0\jre\lib\rt.jar] 284 [Loaded java.net.Parts from C:\jdk1.6.0\jre\lib\rt.jar] 285 [Loaded java.net.URLStreamHandler from C:\jdk1.6.0\jre\lib\rt.jar] 286 [Loaded sun.net.www.protocol.file.Handler from C:\jdk1.6.0\jre\lib\rt.jar] 287 [Loaded java.util.HashSet from C:\jdk1.6.0\jre\lib\rt.jar] 288 [Loaded sun.net.www.protocol.jar.Handler from C:\jdk1.6.0\jre\lib\rt.jar] 289 [Loaded sun.misc.Launcher$AppClassLoader from C:\jdk1.6.0\jre\lib\rt.jar] 290 [Loaded sun.misc.Launcher$AppClassLoader$1 from C:\jdk1.6.0\jre\lib\rt.jar] 291 [Loaded java.lang.SystemClassLoaderAction from C:\jdk1.6.0\jre\lib\rt.jar] 292 [Loaded java.net.URLClassLoader$1 from C:\jdk1.6.0\jre\lib\rt.jar] 293 [Loaded sun.net.util.URLUtil from C:\jdk1.6.0\jre\lib\rt.jar] 294 [Loaded sun.misc.URLClassPath$3 from C:\jdk1.6.0\jre\lib\rt.jar] 295 [Loaded sun.misc.URLClassPath$Loader from C:\jdk1.6.0\jre\lib\rt.jar] 296 [Loaded sun.misc.URLClassPath$JarLoader from C:\jdk1.6.0\jre\lib\rt.jar] 297 [Loaded sun.misc.URLClassPath$JarLoader$1 from C:\jdk1.6.0\jre\lib\rt.jar] 298 [Loaded sun.misc.FileURLMapper from C:\jdk1.6.0\jre\lib\rt.jar] 299 [Loaded java.util.zip.ZipConstants from C:\jdk1.6.0\jre\lib\rt.jar] 300 [Loaded java.util.zip.ZipFile from C:\jdk1.6.0\jre\lib\rt.jar] 301 [Loaded java.util.jar.JarFile from C:\jdk1.6.0\jre\lib\rt.jar] 302 [Loaded sun.misc.JavaUtilJarAccess from C:\jdk1.6.0\jre\lib\rt.jar] 303 [Loaded java.util.jar.JavaUtilJarAccessImpl from C:\jdk1.6.0\jre\lib\rt.jar] 304 [Loaded sun.misc.JarIndex from C:\jdk1.6.0\jre\lib\rt.jar] 305 [Loaded sun.misc.ExtensionDependency from C:\jdk1.6.0\jre\lib\rt.jar] 306 [Loaded java.util.zip.ZipEntry from C:\jdk1.6.0\jre\lib\rt.jar] 307 [Loaded java.util.jar.JarEntry from C:\jdk1.6.0\jre\lib\rt.jar] 308 [Loaded java.util.jar.JarFile$JarFileEntry from C:\jdk1.6.0\jre\lib\rt.jar] 309 [Loaded java.io.DataInput from C:\jdk1.6.0\jre\lib\rt.jar] 310 [Loaded java.io.DataInputStream from C:\jdk1.6.0\jre\lib\rt.jar] 311 [Loaded java.util.zip.ZipFile$ZipFileInputStream from C:\jdk1.6.0\jre\lib\rt.jar] 312 [Loaded java.util.zip.InflaterInputStream from C:\jdk1.6.0\jre\lib\rt.jar] 313 [Loaded java.util.zip.ZipFile$1 from C:\jdk1.6.0\jre\lib\rt.jar] 314 [Loaded java.util.zip.Inflater from C:\jdk1.6.0\jre\lib\rt.jar] 315 [Loaded java.util.zip.ZStreamRef from C:\jdk1.6.0\jre\lib\rt.jar] 316 [Loaded java.security.PrivilegedActionException from C:\jdk1.6.0\jre\lib\rt.jar] 317 [Loaded sun.misc.URLClassPath$FileLoader from C:\jdk1.6.0\jre\lib\rt.jar] 318 [Loaded sun.misc.Resource from C:\jdk1.6.0\jre\lib\rt.jar] 319 [Loaded sun.misc.URLClassPath$FileLoader$1 from C:\jdk1.6.0\jre\lib\rt.jar] 320 [Loaded sun.nio.ByteBuffered from C:\jdk1.6.0\jre\lib\rt.jar] 321 [Loaded java.security.Permissions from C:\jdk1.6.0\jre\lib\rt.jar] 322 [Loaded java.net.URLConnection from C:\jdk1.6.0\jre\lib\rt.jar] 323 [Loaded sun.net.www.URLConnection from C:\jdk1.6.0\jre\lib\rt.jar] 324 [Loaded sun.net.www.protocol.file.FileURLConnection from C:\jdk1.6.0\jre\lib\rt.jar] 325 [Loaded java.net.ContentHandler from C:\jdk1.6.0\jre\lib\rt.jar] 326 [Loaded java.net.UnknownContentHandler from C:\jdk1.6.0\jre\lib\rt.jar] 327 [Loaded sun.net.www.MessageHeader from C:\jdk1.6.0\jre\lib\rt.jar] 328 [Loaded java.io.FilePermission from C:\jdk1.6.0\jre\lib\rt.jar] 329 [Loaded java.io.FilePermission$1 from C:\jdk1.6.0\jre\lib\rt.jar] 330 [Loaded java.security.Policy from C:\jdk1.6.0\jre\lib\rt.jar] 331 [Loaded sun.security.provider.PolicyFile from C:\jdk1.6.0\jre\lib\rt.jar] 332 [Loaded java.security.Policy$UnsupportedEmptyCollection from C:\jdk1.6.0\jre\lib\rt.jar] 333 [Loaded java.io.FilePermissionCollection from C:\jdk1.6.0\jre\lib\rt.jar] 334 [Loaded java.security.AllPermission from C:\jdk1.6.0\jre\lib\rt.jar] 335 [Loaded java.security.UnresolvedPermission from C:\jdk1.6.0\jre\lib\rt.jar] 336 [Loaded java.security.BasicPermissionCollection from C:\jdk1.6.0\jre\lib\rt.jar] 337 [Loaded sun.misc.JavaSecurityProtectionDomainAccess from C:\jdk1.6.0\jre\lib\rt.jar] 338 [Loaded java.security.ProtectionDomain$2 from C:\jdk1.6.0\jre\lib\rt.jar] 339 [Loaded java.security.ProtectionDomain$Key from C:\jdk1.6.0\jre\lib\rt.jar] 340 [Loaded java.security.Principal from C:\jdk1.6.0\jre\lib\rt.jar] 341 [Loaded Example from file:/D:/Users/wuxiong.wx/workspace/Test/LoadClass/Example/bin/] 342 343 准备实例化Cat 344 [Loaded Animal from file:/D:/Users/wuxiong.wx/workspace/Test/LoadClass/Example/bin/] 345 [Loaded Cat from file:/D:/Users/wuxiong.wx/workspace/Test/LoadClass/Example/bin/] 346 I am an animal 347 I am a cat 348 Cat实例化完成 349 350 准备加载MyTest类 351 第一次调用Class.forname() 352 [Loaded MyTest from file:/D:/Users/wuxiong.wx/workspace/Test/LoadClass/Example/bin/] 353 第二次调用Class.forname() 354 355 准备加载MyTest2类 356 [Loaded MyTest2 from file:/D:/Users/wuxiong.wx/workspace/Test/LoadClass/Example/bin/] 357 MyTest2的静态部分初始化 358 359 准备加载MyTest3类 360 [Loaded MyTest3 from file:/D:/Users/wuxiong.wx/workspace/Test/LoadClass/Example/bin/] 361 第二次调用ClassLoader.loadClass() 362 363 程序结束 364 365 [Loaded java.lang.Shutdown from C:\jdk1.6.0\jre\lib\rt.jar] 366 [Loaded java.lang.Shutdown$Lock from C:\jdk1.6.0\jre\lib\rt.jar]