在使用Java反射时，我们可以发现可以通过创建构造函数对象来创建一个Class类对象的实例
Class c1 = Class.forName(className);
Constructor cs = cl1.getConstructor(String.class,int.class);
Object obj = cs.newInstacne("小明",38);
为什么int作为一个基本数据类型却可以使用int.class呢？
其实int.class也是一个基本数据类型
int:
- int.class is a primitive type.
- int.class.isPrimitive() returns true.
- int.class has no fields, public or private, and no methods.
- an int is stored in memory as a literal numerical value. It can have no null value, because null is a memory pointer equal to 0, and 0 is a literal number.
Integer:
- Integer.class is an object type.
- Integer.class.isPrimitive() returns false.
- Integer.class has methods as detailed in the class spec: Integer (Java Platform SE 7 )
- An Integer is stored in memory as a reference (memory pointer) to an int primitive. It can be null, if it the pointer value is 0, the reserved location for null.
