@@ -10,8 +10,10 @@
 public interface Account {
 // 获取余额
 Integer getBalance();
+
 // 取款
 void withdraw(Integer amount);
+
 /**
 * 方法内会启动 1000 个线程，每个线程做 -10 元 的操作
 * 如果初始余额为 10000 那么正确的结果应当是 0

@@ -8,6 +8,7 @@
 * @Description:CAS无锁保证安全
 */
 public class Account_CAS implements Account {
+
 private AtomicInteger balance;
 
 public Account_CAS(Integer balance) {

@@ -6,14 +6,18 @@
 * @Description:synchronized加锁保证安全
 */
 public class Account_Sync implements Account{
+
 private Integer balance;
+
 public Account_Sync(Integer balance) {
 this.balance = balance;
 }
+
 @Override
 public synchronized Integer getBalance() {
 return balance;
 }
+
 @Override
 public synchronized void withdraw(Integer amount) {
 balance -= amount;