Java reflection to produce instantiated objects of class three methods

First, each class generates a. class file when it is instantiated. The class object creates a class object for the. class file when it is read into memory.

Reflection is the manipulation of a class object.

1  PackageReflect.vo;2 3 /**4  * @authorGuohao5 * Java Test class student6  */7  Public classStudent {8     PrivateString name;9     Private intAge ;Ten     Private floatscore; One  A      PublicStudent () { -     } -  the      PublicString GetName () { -         returnname; -     } -  +      Public voidsetName (String name) { -          This. Name =name; +     } A  at      Public intGetage () { -         returnAge ; -     } -  -      Public voidSetage (intAge ) { -          This. Age =Age ; in     } -  to      Public floatGetscore () { +         returnscore; -     } the  *      Public voidSetScore (floatscore) { $          This. score =score;Panax Notoginseng     } -  the}

The 1.Object class provides a way to return a class class object GetClass ()

1  PackageReflect.vo;2  Public classTest {3  4   Public Static voidMain (string[] args)throwsException {5   6Student stu =NewStudent ();//This new creates a student object, a class object. 7Class cls = Stu.getclass ();//Get Class object8 System.out.println (Cls.getname ()); 9         Ten}

2. Take advantage of "class. Class" To obtain

1  PackageReflect.vo;2 3  Public classTest {4 5      Public Static voidMain (string[] args)throwsException {6Class cls = Student.class; 7 System.out.println (CLS);8     }9}

3. Use the static method of class to obtain Class.forName ();

1  PackageReflect.vo;2 3  Public classTest {4 5      Public Static voidMain (string[] args)throwsException {6Class<?> cls = Class.forName ("Reflect.vo.Student");7       System.out.println (CLS);9     }Ten}

Three ways to use the third, the first object has to reflect what to do.

The second type of package that needs to be imported is too strong to throw a compile error without a packet.

Generally the third type, a string can be passed in also can be written in the configuration file medium multiple methods.

Note: The last sentence is quoted from 71799078

　

Java reflection to produce instantiated objects of class three methods