java - Can I better use memory in this program? -

the code below works way want work. wanting see if using necessary amount of memory , not of it. want go programming career nice hear of professionals out there.

import java.util.*; public class guessinggame {     public static void main(string[] args) {         int counter = 0, number, guess, yes = 1, no =2, answer;          scanner input = new scanner(system.in);          number = ((int) (math.random() * 100));          system.out.println("would play guessing game?");         system.out.println("enter " + yes + " yes, , enter " + no + " no");         answer = input.nextint();          if(answer == no) {             return;         } else {             while (answer == yes) {             system.out.println("welcome guessing game");             system.out.println("there has been number between 1 , 100 picked \n have 5 chances guess number");             system.out.print("please enter guess >> ");             guess = input.nextint();              while (guess != number) {                 if (guess != number) {                     counter = ++counter;                 }                 if (counter == 5) {                     system.out.println("you have used guesses");                     system.out.println("the number " + number);                     system.out.println("would play again?");                     system.out.println("enter " + yes + " yes , " + no + " no");                     answer = input.nextint();                     counter = -1;                     if (answer == no)                     return;                 } else if (guess < number) {                     system.out.println("you need guess higher");                     system.out.println("you have used " + counter + " guess(es)");                     system.out.println("please enter new guess");                     guess = input.nextint();                 } else if (guess > number) {                     system.out.println("you need guess lower");                     system.out.println("you have used " + counter + " guess(es)");                     system.out.println("please enter new guess");                     guess = input.nextint();                 }              }             system.out.println("you win");             system.out.println("would play again");                 system.out.println("enter " + yes + " yes , " + no + " no");                 answer = input.nextint();                 if(answer == no)                     return;         }     } } } 

i wouldn't worry memory optimisation unless have memory profiled application , has found problem. time money , 1 gb of memory cheaper hour of time, 1 mb worth few seconds , 1 kb isn't worth time takes press 1 key, , not using 1 kb of objects.

in bigger program suggest use jmc profile application, , in particular @ allocation rate , think how can decrease it.