java - properly using constructors to change int value? -

i have 2 classes. 1. main , 2. gun.

gun:

public class gun {     private int ammoamount = 15;     public int getammoamount() { //i believe allows me see value of ammoamount , use in main class.         return ammoamount; // returns value of ammoamount getammoamount?     }     public gun(int ammousage) { //this constructor right?         ammoamount = ammoamount - ammousage; //method makes ammoamount decrease ammousage.     }     public void newammoamount() {         system.out.println("you have " + ammoamount + " bullet(s) left."); // output of how bullet left.     } } 

main:

import java.util.random; public class main {      public static void main(string[] args) {          random rand = new random();         gun fire1 = new gun(0); // need create objective?         fire1.newammoamount(); // need code below?         int clip = fire1.getammoamount(); // need set clip while loop?         { //starts loop         int x = 5; //max # random can go to.         int y = rand.nextint(x); //makes random integer 0 5 variable y.         gun fire = new gun(y); //this objective uses constructor?         system.out.println("you shot " + y + " bullet(s)."); //print's out shots random value y.         fire.newammoamount(); //uses method in gun class?         } while( clip > 0); //loops method till clip less 0.     } } 

i try running program keeps on looping , never ends. value ammoamount not saved in gun class. how make can change int value different class?

i had recent question well. tried using constructors stated.

how call class class main? , keep output values?

but can see i'm not successful. smaller concept of bigger 1 trying to. basically, did constructors right? , fix this?

i added comments source code show other questions might possibly have , if did right well.

your "gun" object immutable - there nothing can change state of object. such types have lot of usage, unlikely want.

it sounds want instance of "gun" "fire" , result number of renaming bullets in instance of "gun" decrease. creating new "gun" object not change number of bullets in first one.

public class gun {     ...     public fire(int ammousage) {         ammoamount = ammoamount - ammousage; // todo: add check less 0      } } 

with update class can fire till no bullets left:

   int maxbulletsperround = 5;     gun gun = new gun(0); // loaded    int clip;    {     int numberofbullets = rand.nextint(maxbulletsperround);      gun.fire(numberofbullets);     system.out.println("you shot " + numberofbullets + " bullet(s).");      gun.newammoamount(); //uses method in gun class?     clip = gun.getammoamount(); // check how many bullets left   } while( clip > 0);  

note may better use while(gun.getammoamount() > 0).