diff --git a/s-day07/src/com/inmind/lambda01/Demo01.java b/s-day07/src/com/inmind/lambda01/Demo01.java
index f1a649f..8a23658 100644
--- a/s-day07/src/com/inmind/lambda01/Demo01.java
+++ b/s-day07/src/com/inmind/lambda01/Demo01.java
@@ -53,5 +53,7 @@ public class Demo01 {
         new Thread(()->{
             System.out.println(Thread.currentThread().getName()+"线程启动了");
         }).start();
+ new Thread(()-> System.out.println(Thread.currentThread().getName()+"线程启动了")).start()
+       ;
     }
 }
diff --git a/s-day07/src/com/inmind/lambda01/Demo02.java b/s-day07/src/com/inmind/lambda01/Demo02.java
index 6d314ec..d850bca 100644
--- a/s-day07/src/com/inmind/lambda01/Demo02.java
+++ b/s-day07/src/com/inmind/lambda01/Demo02.java
@@ -21,11 +21,11 @@ public class Demo02 {
             }
         });*/
         //使用lambda表达式简化以上代码
-        Collections.sort(students,(Student o1, Student o2)->{
+        /*Collections.sort(students,(Student o1, Student o2)->{
             return o1.score-o2.score;
-        });
+        });*/
 
+        Collections.sort(students,(o1,  o2)-> o2.score-o1.score);
         System.out.println(students);
-
     }
 }
diff --git a/s-day07/src/com/inmind/lambda01/Demo03.java b/s-day07/src/com/inmind/lambda01/Demo03.java
new file mode 100644
index 0000000..97cd166
--- /dev/null
+++ b/s-day07/src/com/inmind/lambda01/Demo03.java
@@ -0,0 +1,9 @@
+package com.inmind.lambda01;
+/*
+ lambda表达式的省略语法:
+    1.参数列表()中的数据类型可以省略
+    2.如果(),参数列表中只有一个参数,并且数据类型已经省略,那么小括号也可以省略
+    3.如果{}中只有一条java语句,那么大括号,return,分号可以同时省略
+ */
+public class Demo03 {
+}