The ability to implement global variables in Java

First, through the interface to achieve

Second, static variable declaration

1  PackageTest.autorun;2 3 Importjava.util.LinkedList;4 ImportJava.util.Queue;5 6  Public classMyVar {7     Private Static intNcount=0;8     Private StaticQueue<string> queue=NewLinkedlist<string>();;9      Public  intGetncount () {Ten         returnncount; One     } A      Public  voidSetncount (intncount) { -Myvar.ncount =ncount; -     } the      PublicQueue<string>Getqueue () { -         returnqueue; -     } -      Public  voidSetqueue (queue<string>queue) { +Myvar.queue =queue; -     }   +  A}

Use in other classes

1MyVar myvar=NewMyVar ();2             3Myvar.getqueue (). Offer ("Hello");4Myvar.getqueue (). Offer ("world!");5         6 System.out.println (Myvar.getqueue (). Size ()); 7 String str; 8             while((Str=myvar.getqueue (). Poll ())! =NULL){  9 System.out.print (str); Ten            }   One System.out.println ();  ASystem.out.println (Myvar.getqueue (). Size ());

The ability to implement global variables in Java