public class CoinFlip {

  public static void main(String[] args) {
    int bank = 500;
    int headsCount=0;
    int tailsCount=0;
    int winCounter=0;
    int lossCounter=0;
    String[] flipResults = new String[100];

    ComputerPlayer randomPlayer = new ComputerPlayer();
    Coin coin = new Coin();

    for (int i = 0; i < 100; i++) {
        randomPlayer.placeRandomBet();
        flipResults[i] = coin.flip();
        if(flipResults[i].equals("heads")){
            headsCount += 1;
        }
        else{
            tailsCount +=1;
        }
        if(flipResults[i].equals(randomPlayer.placeRandomBet())){
            bank += 50;
            winCounter+=1;
        }
        if(!flipResults[i].equals(randomPlayer.placeRandomBet())){
            bank -=50;
            lossCounter+=1;
    }
  }
}

public static class ComputerPlayer{

    int Bank = 500;
    double bet;
    String heads = "heads";
    String tails = "tails";

    public ComputerPlayer(){}

    public String placeRandomBet(){
        bet = Math.random();
        if(bet < .5){
            return heads;
        }
        else return tails;
    }

    public static String placeLearnedBet(int wins; int losses){
        //not sure where to start
    }
}

public static class Coin {

    double coin;
    String heads = "heads";
    String tails = "tails";

    public String flip() {
        if (Math.random() < .9) {
            return heads;
        } else {
            return tails;
        }
    }

}