[Ch15] 2nd Ed Ryan and Monica

package ch15;

class BankAccount {

  private int balance = 100;

  public int getBalance() {

    return balance;

  }

  public void withdraw(int amount) {

    balance = balance - amount;

  }

}

public class RyanAndMonicaJob implements Runnable {

  private BankAccount account = new BankAccount();

  public static void main(String[] args) {

    RyanAndMonicaJob theJob = new RyanAndMonicaJob();

    Thread one = new Thread(theJob);

    Thread two = new Thread(theJob);

    one.setName("Ryan");

    two.setName("Monica");

    one.start();

    two.start();

  }

  public void run() {

    for (int x = 0; x < 10; x++) {

      makeWithdrawal(10);

      if (account.getBalance() < 0) {

        System.out.println("Overdrawn!");

      }

    }

  }

  private void makeWithdrawal(int amount) {

    if (account.getBalance() >= amount) {

      System.out.println(Thread.currentThread().getName() + " is about to withdraw");

      try {

        System.out.println(Thread.currentThread().getName() + " is going to sleep");

        Thread.sleep(500);

      } catch (InterruptedException ex) {

        ex.printStackTrace();

      }

      System.out.println(Thread.currentThread().getName() + " woke up.");

      account.withdraw(amount);

      System.out.println(Thread.currentThread().getName() + " completes the withdrawal");

    } else {

      System.out.println("Sorry, not enough for " + Thread.currentThread().getName());

    }

  }

}

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