Java Singleton mode

 Public classDanli {PrivateDanli () {}Private  StaticDanli d1=NULL;  Public StaticDanli instance () {if(d1==NULL) {D1=NewDanli (); }        returnD1; }    Private intM=0;  Public voidrun () { for(inti=0;i<10;i++) {m++; System.out.println ("M=" +m); }            }     Public Static voidMain (string[] args) {System.out.println ("T1 single case"); Danli T1=danli.instance ();        T1.run (); System.out.println ("T2 single Case"); Danli T2=danli.instance ();    T2.run (); }}

 Public classDanLi2 {PrivateDanLi2 () {}Private Final StaticDanLi2 t1=NewDanLi2 ();  Public StaticDanLi2 Instance () {returnT1; }    Private intM=0;  Public voidrun () { for(inti=0;i<10;i++) {m++; System.out.println ("M=" +m); }            }     Public Static voidMain (string[] args) {System.out.println ("T1 single case"); Danli T1=danli.instance ();        T1.run (); System.out.println ("T2 single Case"); Danli T2=danli.instance ();    T2.run (); }}

Java Singleton mode