diff --git a/src/main/java/lambdasinaction/chap2/FilteringApples.java b/src/main/java/lambdasinaction/chap2/FilteringApples.java
index 0f61fd08..a52adf5f 100644
--- a/src/main/java/lambdasinaction/chap2/FilteringApples.java
+++ b/src/main/java/lambdasinaction/chap2/FilteringApples.java
@@ -2,6 +2,12 @@
 
 import java.util.*;
 
+// 编译
+// javac FilteringApples.java
+
+// 运行
+// cd ../../
+// java lambdasinaction.chap2.FilteringApples 
 public class FilteringApples{
 
 	public static void main(String ... args){