Java time required for code to run--template method design pattern

Principle: End time-Start time Currenttimemillis

Abstract classdemo{ Public Final voidGetTime () {LongStart =system.currenttimemillis ();//1 sec =1000 msfunction (); LongStop =System.currenttimemillis (); System.out.println ("Total Cost" + (stop-start)); }      Public Abstract voidfunction ();}classTestextendsdemo{ Public voidfunction () { for(inti=0;i<1000;i++) {System.out.print ("F"); }    }} Public classa6_60{ Public Static voidMain (string[] args) {Test T=NewTest ();    T.gettime (); }}

What is a template design pattern: When a function is defined, part of the function is determined, and the identified part is not determined, then it is necessary to expose the indeterminate part to the subclass to complete

Java time required for code to run--template method design pattern