Java reflection Class of class exercises

1  PackageZhang;2 /**3 * Java Reflection class exercises4  * 5 * In Object-oriented language, everything is object, so who is the object of the class? 6 * Classes are of class type7  * 8  * */9 classtest{Ten     voidprint () { OneSystem.out.println ("Hello world!"); A     } -}//test is a class.  -  Public classClassdemo { the      Public Static voidMain (string[] args) { -         //How to create a test object -Test test=NewTest ();//this creates the object except test by using new -         //so the class is also an object, as the test class, how do you create an object that is Object test?  +         /* -          *  + * Constructor. Only the Java Virtual machine creates Class A * objects. at * Private Class () {} - * The class class is constructed in a private way, so you cannot create a class object from new.  - * Class objects can only be created from Java virtual machines -          */ -   -         /** in * There are three different ways -          * */ to         /*The first: Class T1=test.class this way is actually telling us any + * A class that has an implied static member class -          *  the * Created with known types *          */ $         Panax NotoginsengClass T1=test.class; -          the         /* + * Second Type A * created with objects of known types the          * */ +Class t2=Test.getclass (); -          $System.out.println (t2==T1); $          -         /* -          *  the * Third Type -          * */WuyiClass t3=NULL; the         Try { -T3=class.forname ("Zhang. Test "); Wu}Catch(ClassNotFoundException e) { -             //TODO auto-generated Catch block About e.printstacktrace (); $         } -          -System.out.println (t3==T2); -         //that is to say: whether T1 or T2 represents the class type of the test class, a class can only be an instance object of a class class.  A          +         //We can create the test object by T1 or T2 or T3.  the         Try { -Test test1= (Test) t1.newinstance ();//This creates an instance of test. $ test1.print (); the              the              the}Catch(instantiationexception e) { the             //TODO auto-generated Catch block - e.printstacktrace (); in}Catch(illegalaccessexception e) { the             //TODO auto-generated Catch block the e.printstacktrace (); About         }     the     } the}

Package Zhang;
/**
* Java Reflection class Exercises
*
* In object-oriented language, everything is object, so who is the object of the class?
* Classes are of class type
*
* */
Class test{
void print () {
System.out.println ("Hello world!");
}
}//test is a class.
public class Classdemo {
public static void Main (string[] args) {
How to create a test object
Test test=new test ();//This creates an object except test by using new
So the class is also an object, as the test class, how do you create an object that is Object test?
/*
*
* Constructor. Only the Java Virtual machine creates Class
* Objects.
* Private Class () {}
* The class class is constructed in a private way, so you cannot create a class object from new.
* Class objects can only be created from Java virtual machines
*/

/**
* There are three different ways
* */
/* First: Class T1=test.class this way is actually telling us any
* A class that has an implied static member class
*
* Created with known types
*/

Class T1=test.class;

/*
* Second Type
* Created with objects of known types
* */
Class T2=test.getclass ();

System.out.println (T2==T1);

/*
*
* Third Type
* */
Class T3=null;
try {
T3=class.forname ("Zhang. Test ");
} catch (ClassNotFoundException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}

System.out.println (T3==T2);
In other words: whether T1 or T2 represents the class type of the test class, a class can only be an instance object of the class.

We can create the test object by T1 or T2 or T3.
try {
Test test1= (Test) t1.newinstance ();//This creates an instance of test
Test1.print ();


} catch (Instantiationexception e) {
TODO auto-generated Catch block
E.printstacktrace ();
} catch (Illegalaccessexception e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
}
}

Java reflection Class of class exercises