diff --git a/Java高级特性 - 多线程练习题.txt b/Java高级特性 - 多线程练习题.txt
deleted file mode 100644
index c38bef4..0000000
--- a/Java高级特性 - 多线程练习题.txt	
+++ /dev/null
@@ -1,64 +0,0 @@
-package step1;
-
-public class Task {
-	public static void main(String[] args) throws Exception {
-		/********* Begin *********/
-		// 在这里创建线程， 开启线程
-
-		Object a = new Object();
-		Object b = new Object();
-		Object c = new Object();
-		// 在这里创建线程， 开启线程
-		MyThread th1 = new MyThread("AA", a, c);
-		MyThread th2 = new MyThread("BB", c, b);
-		MyThread th3 = new MyThread("CC", b, a);
-
-		th1.start();
-		Thread.sleep(10);
-		th2.start();
-		Thread.sleep(10);
-		th3.start();
-		Thread.sleep(10);
-		System.exit(0);
-
-		/********* End *********/
-	}
-}
-
-class MyThread extends Thread {
-	/********* Begin *********/
-
-	String threadName;
-	Object a = null;
-	Object b = null;
-
-	public MyThread(String threadName, Object a, Object b) {
-		super();
-		this.threadName = threadName;
-		this.a = a;
-		this.b = b;
-	}
-
-	public synchronized void run() {
-
-		int count = 5;
-		while (count > 0) {
-			synchronized (a) {
-				synchronized (b) {
-					System.out.println("Java Thread" + this.threadName);
-					count--;
-					b.notify();
-
-				}
-				try {
-					a.wait();
-				} catch (InterruptedException e) {
-					// TODO 自动生成的 catch 块
-					e.printStackTrace();
-				}
-			}
-		}
-
-	}
-	/********* End *********/
-}