MyBattleShipGame2.java

import java.util.Scanner;

class SimpleDotCom{
    private int hitNum=0,shipSize=0;
    private int shipCell[]= new int[8];
    Scanner input = new Scanner(System.in);

    // setters :

    public void setShipSize(int size){
        shipSize=size;
    }
    public void setLocation(int cellLocation, int index){
        shipCell[index]=cellLocation;
    }
    public void setHitNum(int num){
        hitNum=num;
    }


    // getters :

    public int getShipSize(){
        return shipSize;
    }
    public int getHitNum(){
        return hitNum;
    }

    //methods :

    public void putShipInBattlezone(){

        int randomNum=(int)(Math.random()*15); // the virtual array is of size 15

        for(int i=0;i<shipSize;i++){
            setLocation((randomNum+i),i);
        }
        System.out.println("\n\nbattleship placed.. let the destruction begin!!\n\n......................................................");
    }


    public boolean checkHit(int guessedLocation,int size){

        System.out.printf("in checkHit, location passed: %d  size passed: %d \n",guessedLocation,size);
        boolean checkHitFlag=false;

        for(int i=0;i<size;i++){
            if(shipCell[i]==guessedLocation){
                setLocation(-1,i); // setLocation takes a value and an index, here change the hit cell's value to -1, so we know its been hit
                checkHitFlag = true;
                break;
            }

        }
        return checkHitFlag;
    }




    public boolean checkSunk(int num){

        System.out.printf("\nin checksunk,num passed: %d \n\n",num);
        boolean sunkFlag=false;

        if(shipSize==num){
            sunkFlag=true;
        }
        return sunkFlag;
    }
    public void shipHasSunk(){
        System.out.print("ouch! you have sunk the ship!");
    }
}

class MyBattleShipGame2{

    public static void main (String [] args) {

        Scanner input = new Scanner(System.in);
        SimpleDotCom game = new SimpleDotCom();

        System.out.print("enter size of ship: "); // ship size entered
        game.setShipSize(input.nextInt());
        System.out.printf("entered ship size is: %d \n",game.getShipSize());

        game.putShipInBattlezone(); // ship is now put on battle feild, let the destruction begin

        int doFlag=0,hits=0;
        do{
            int guess=0; // make a guess
            System.out.print("enter guess (+ve values only) : ");
            guess=input.nextInt();

            if(game.checkHit(guess,game.getShipSize())){ // check if guess was correct

                System.out.println("hit\n");

                game.setHitNum(1+game.getHitNum()); // increments hitNum, which is initially 0
                System.out.println("incrementing hitNum\n");
                hits=game.getHitNum();
                System.out.printf("total hits scored: %d \n",hits);

                if(game.checkSunk(hits)){ // passes incremented value of hitNum to sunk() to see if ship has sunk
                    doFlag=1;
                    game.shipHasSunk();
                    break;
                }
            }
            else{
                System.out.println("miss");
            }
        }while(doFlag!=1); // until ship has sunk
    }
}