For the shallow copy approach, we only copy field values, therefore the copy might be dependant on the original object. In the deep copy approach, we make sure that all the objects in the tree are deeply copied, so the copy isn’t dependant on any earlier existing object that might ever...
// Make shallow object copy const int size = obj->size(); oop new_obj = NULL; if (obj->is_array()) { const int length = ((arrayOop)obj())->length(); new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); } else { new_obj = CollectedHeap::obj_allocate(k...
* object and initializes all its fields with exactly the contents of * the corresponding fields of this object, as if by assignment; the * contents of the fields are not themselves cloned. Thus, this method * performs a "shallow copy" of this object, not a "deep copy" operation. * <...
// Make shallow object copy const int size = obj->size(); oop new_obj_oop = NULL; if (obj->is_array()) { const int length = ((arrayOop)obj())->length(); new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); } else { new_obj_oop = CollectedHeap::...
接下来,使用Object的clone方法演示,更加简便快捷,复制对象的操作! 1.2 使用clone方法创建对象 1.2.1 使用步骤 在需要clone方法的类上实现Cloneable接口 重写clone方法,在自己的clone方法中调用父类的clone方法,将返回值类型强转成本类类型,将当前clone方法修饰符改为public ...
class) { throw new SecurityException("Can not make a java.lang.Class" + " constructor accessible"); } } obj.override = flag; } 多说一句,Field同样继承了AccessibleObject,且Field的override也是初始化为false的,也就是说并没有按照变量的修饰符去初始化不同的值。但是我们在调用Field.set(Object obj,...
ObjectSynchronizer::fashHashCode()方法在 openjdk\hotspot\src\share\vm\runtime\synchronizer.cpp文件中实现,其核心代码实现如下所示: // hashCode() generation :/// Possibilities:// * MD5Digest of {obj,stwRandom}// * CRC32 of {obj,stwRandom} or any linear-feedback shift register function.// *...
t.c.y = c.y;// Create a new object for the field c// and assign it to shallow copy obtained,// to make it a deep copyreturnt; } }publicclassMain{publicstaticvoidmain(String args[])throwsCloneNotSupportedException{ Test2 t1 =newTest2(); ...
log=log2_long((jlong)region_size);// Recalculate the region size to make sure it's a power of// 2. This means that region_size is the largest power of 2 that's// <= what we've calculated so far.region_size=((uintx)1<<region_size_log);// Now make sure that we don't go...
NumberOfDocuments NumberOfInterveningJobs NumberUp NumberUpSupported NumericShaper NVList OAEPParameterSpec OBJ_ADAPTER Object Object OBJECT_NOT_EXIST ObjectAlreadyActive ObjectAlreadyActiveHelper ObjectChangeListener ObjectFactory ObjectFactoryBuilder ObjectHelper ObjectHolder ObjectIdHelper...