java - Should I use "this" keyword when I want to refer to instance variables within a method? -

my teacher says when try access instance variable within method should use this keyword, otherwise perform double search. local scope search , instance scope search.

example:

public class test(){     int cont=0;     public void method(){         system.out.println(cont);//should use this.cont instead?     } } 

i hope wrong, can't find argument.

no, use this when have name conflict such when method parameter has same name instance field setting.

it can used @ other times, many of feel adds unnecessary verbiage code.