From 17f951ccc300320f5fb1d46e00f9f4cce154cc7a Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 6 Aug 2026 11:22:55 +0800
Subject: [PATCH] =?UTF-8?q?s-day06-synchornized=E4=BB=A3=E7=A0=81=E5=9D=97?=
 =?UTF-8?q?=E8=A7=A3=E5=86=B3=E7=BA=BF=E7=A8=8B=E5=AE=89=E5=85=A8=E9=97=AE?=
 =?UTF-8?q?=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/inmind/thread_safe04/TicketTask.java  |  2 --
 .../thread_safe_sychronized05/Demo06.java     | 28 ++++++++++++++++++
 .../thread_safe_sychronized05/TicketTask.java | 29 +++++++++++++++++++
 3 files changed, 57 insertions(+), 2 deletions(-)
 create mode 100644 s-day06/src/com/inmind/thread_safe_sychronized05/Demo06.java
 create mode 100644 s-day06/src/com/inmind/thread_safe_sychronized05/TicketTask.java

diff --git a/s-day06/src/com/inmind/thread_safe04/TicketTask.java b/s-day06/src/com/inmind/thread_safe04/TicketTask.java
index 56aff9b..58ff6e4 100644
--- a/s-day06/src/com/inmind/thread_safe04/TicketTask.java
+++ b/s-day06/src/com/inmind/thread_safe04/TicketTask.java
@@ -10,14 +10,12 @@ public class TicketTask implements Runnable{
         while (true) {
             //如果有票就卖
             if (ticketCount > 0) {
-
                 //模拟卖票时间
                 try {
                     Thread.sleep(50);
                 } catch (InterruptedException e) {
                     e.printStackTrace();
                 }
-
                 System.out.println(Thread.currentThread().getName() + "正在卖第" + ticketCount + "张票");
                 ticketCount--;
             } else {
diff --git a/s-day06/src/com/inmind/thread_safe_sychronized05/Demo06.java b/s-day06/src/com/inmind/thread_safe_sychronized05/Demo06.java
new file mode 100644
index 0000000..b53ead8
--- /dev/null
+++ b/s-day06/src/com/inmind/thread_safe_sychronized05/Demo06.java
@@ -0,0 +1,28 @@
+package com.inmind.thread_safe_sychronized05;
+
+/*
+在java中可以使用一个关键字synchronized来解决线程安全问题.
+
+    synchronized能够修饰代码块和方法,修饰代码块之后就被称之为同步代码块,修饰方法之后就被称之为同步方法
+
+    同步代码块语法:
+    synchronized(锁对象){
+        具有线程安全问题的代码
+    }
+
+    同步代码块的作用:只有拥有锁对象的线程才能进入同步代码块去执行,如果没有锁对象的线程
+    就会被阻塞在synchronized关键字处.
+
+    锁对象:可以是java中的任意一个对象.Object String ArrayList.
+
+    注意:在同步代码块中,锁对象不管有多少个线程,它只能是同一个
+ */
+public class Demo06 {
+    public static void main(String[] args) {
+        //创建卖票任务
+        TicketTask ticketTask = new TicketTask();
+        new Thread(ticketTask, "窗口1").start();
+        new Thread(ticketTask,"窗口2").start();
+        new Thread(ticketTask,"窗口3").start();
+    }
+}
diff --git a/s-day06/src/com/inmind/thread_safe_sychronized05/TicketTask.java b/s-day06/src/com/inmind/thread_safe_sychronized05/TicketTask.java
new file mode 100644
index 0000000..f2527d6
--- /dev/null
+++ b/s-day06/src/com/inmind/thread_safe_sychronized05/TicketTask.java
@@ -0,0 +1,29 @@
+package com.inmind.thread_safe_sychronized05;
+
+//卖票任务:就是卖100张票
+public class TicketTask implements Runnable{
+    int ticketCount = 100;//100张票
+    Object lock = new Object();//锁对象
+
+    @Override
+    public void run() {
+        //有票就卖
+        while (true) {
+            synchronized (lock){//这里是3个线程共享的同一个锁对象
+                //如果有票就卖
+                if (ticketCount > 0) {
+                    //模拟卖票时间
+                    try {
+                        Thread.sleep(50);
+                    } catch (InterruptedException e) {
+                        e.printStackTrace();
+                    }
+                    System.out.println(Thread.currentThread().getName() + "正在卖第" + ticketCount + "张票");
+                    ticketCount--;
+                } else {
+                    break;//结束循环
+                }
+            }
+        }
+    }
+}