[Ch15] Had to change Ryan and Monica because synchronized only works if the... (73f1d6ff) · Commits · examples / Head First Java 3rd Edition

src/main/java/ch15/RyanAndMonicaTest.java

+17 −16

Changes for src/main/java/ch15/RyanAndMonicaTest.java: 17 added lines, 16 removed lines.
Original line number	Diff line number	Diff line
		@@ -3,18 +3,6 @@ package ch15;
		import java.util.concurrent.ExecutorService;
		import java.util.concurrent.Executors;

		class BankAccount {
		private int balance = 100;

		public int getBalance() {
		return balance;
		}

		public void withdraw(int amount) {
		balance = balance - amount;
		}
		}

		public class RyanAndMonicaTest {
		public static void main(String[] args) {
		BankAccount account = new BankAccount();
		@@ -38,22 +26,34 @@ class RyanAndMonicaJob implements Runnable {

		public void run() {
		for (int i = 0; i < 10; i++) {
		makeWithdrawal(10);
		account.makeWithdrawal(10, name);
		if (account.getBalance() < 0) {
		System.out.println("Overdrawn!");
		}
		}
		}
		}

		private void makeWithdrawal(int amount) {
		if (account.getBalance() >= amount) {
		class BankAccount {
		private int balance = 100;

		public int getBalance() {
		return balance;
		}

		private void withdraw(int amount) {
		balance = balance - amount;
		}

		public void makeWithdrawal(int amount, String name) {
		if (balance >= amount) {
		System.out.println(name + " is about to withdraw");
		try {
		System.out.println(name + " is going to sleep");
		Thread.sleep(500);
		} catch (InterruptedException ex) {ex.printStackTrace();}
		System.out.println(name + " woke up.");
		account.withdraw(amount);
		withdraw(amount);
		System.out.println(name + " completes the withdrawal");
		} else {
		System.out.println("Sorry, not enough for " + name);
		@@ -61,3 +61,4 @@ class RyanAndMonicaJob implements Runnable {
		}
		}