[Ch15] Updating Ryan and Monica example - firstly with Executors, and secondly...

package ch15;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

public class TestRyanAndMonica {

  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();

    BankAccount account = new BankAccount();

    RyanAndMonicaJob ryan = new RyanAndMonicaJob("Ryan", account);

    RyanAndMonicaJob monica = new RyanAndMonicaJob("Monica", account);

    ExecutorService executor = Executors.newFixedThreadPool(2);

    executor.execute(ryan);

    executor.execute(monica);

    executor.shutdown();

  }

}

class RyanAndMonicaJob implements Runnable {

  private final BankAccount account = new BankAccount();

  private final String name;

  private final BankAccount account;

  RyanAndMonicaJob(String name, BankAccount account) {

    this.name = name;

    this.account = account;

  }

  public void run() {

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

  private void makeWithdrawal(int amount) {

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

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

      System.out.println(name + " is about to withdraw $10. Current balance: " + account.getBalance());

      try {

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

        System.out.println(name + " is going to sleep");

        Thread.sleep(500);

      } catch (InterruptedException ex) {

        ex.printStackTrace();

      }

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

      System.out.println(name + " woke up.");

      account.withdraw(amount);

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

      System.out.println(name + " completes the withdrawal. New balance: " + account.getBalance());

    } else {

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

      System.out.println("Sorry, not enough for " + name);

    }

  }

}

class BankAccount {

  private int balance = 100;

  private int balance = 50;

  public int getBalance() {

    return balance;