@@ -0,0 +1,47 @@
+package org.javacore.thread;
+
+/*
+ * Copyright [2015] [Jeff Lee]
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @author Jeff Lee
+ * @since 2015-11-2 16:56:43
+ * 	Runnable接口的实现类LiftOff
+ */
+public class LiftOff implements Runnable{
+
+    protected int countDown = 10;
+    private static int taskCount = 0;
+    private final int id = taskCount++;
+
+    public LiftOff(){}
+    public LiftOff(int countDown){
+        this.countDown = countDown;
+    }
+
+    public String status(){
+        return "#" + id + "(" +
+                (countDown >0 ? countDown : "LiftOff!") + "), ";
+    }
+    @Override
+    public void run() {
+        while (countDown-- > 0){
+            System.out.println(status());
+            // 暂停当前正在执行线程，并执行其他线程。
+            Thread.yield();
+        }
+    }
+}