Tutorial on using reflection Class class

Any class is an instance object of the Class class. This instance object has three ways of expression

• The first way of expression (any class has an implicit static member Variable class):

1 Class c1 = Foo.class;

• The second representation method (the object of this class is known, through the getClass method):

1 Foo foo1 = new Foo(); 
2 Class c2 = foo1.getClass();

　※ c1 and c2 represent the class of Foo class Type (class type)

• The third way of expression

1 Class c3 = null;2 try {3     c3 = Class.forName("com.format.test.Foo");4 } catch (ClassNotFoundException e) {5     e.printStackTrace();6 }

　※ Create the class through the type of the class Object instance

1 try {2     Foo foo2 = (Foo) c1.newInstance(); //需要有无参构造3 } catch (InstantiationException e) {4     e.printStackTrace();5 } catch (IllegalAccessException e) {6     e.printStackTrace();7 }

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