02-Classes and objects-track the number of class object creation

You can track the number of objects created by a class by using the class's static fields and constructors. Please write a class, and at any time you can query it for "How many objects have you created?"

1  Public classDuixiang {2      Public Static voidMain (String args[]) {3Tongji x=NewTongji ();4 X.shuchu ();5Tongji y=NewTongji ();6 Y.shuchu ();7Tongji z=NewTongji ();8 Z.shuchu ();9     }Ten  One } A classtongji{ -     Static intSum=0; - Tongji () { thesum++; -     } -      Public voidShuchu () { -SYSTEM.OUT.PRINTLN ("You have created a +sum+" object.) "); +     } -}

The results of the operation are as follows:

02-Classes and objects-track the number of class object creation