diff --git a/Java高级特性 - 多线程基础（3）线程同步.txt b/Java高级特性 - 多线程基础（3）线程同步.txt
deleted file mode 100644
index 822cbad..0000000
--- a/Java高级特性 - 多线程基础（3）线程同步.txt	
+++ /dev/null
@@ -1,36 +0,0 @@
-1.使用synchronized关键字同步线程
-package step2;
-
-public class Task {
-
-	public static void main(String[] args) {
-
-		final insertData insert = new insertData();
-
-		for (int i = 0; i < 3; i++) {
-			new Thread(new Runnable() {
-				public void run() {
-					insert.insert(Thread.currentThread());
-				}
-			}).start();
-		}
-
-	}
-}
-
-class insertData {
-
-	public static int num = 0;
-
-	/********* Begin *********/
-	public synchronized void insert(Thread thread) {
-
-		for (int i = 0; i <= 5; i++) {
-			num++;
-			System.out.println(num);
-		}
-	}
-
-	/********* End *********/
-}
-