From 6f936dffa1507f56aae07fe13effeb78bfa9ad1f Mon Sep 17 00:00:00 2001
From: Joe <736777445@qq.com>
Date: Wed, 18 Sep 2019 21:33:29 +0800
Subject: [PATCH] Update 10-Interfaces.md

---
 docs/book/10-Interfaces.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/book/10-Interfaces.md b/docs/book/10-Interfaces.md
index 927861c..a1f487a 100644
--- a/docs/book/10-Interfaces.md
+++ b/docs/book/10-Interfaces.md
@@ -857,7 +857,7 @@ package interfaces.filters;
 
 public class Waveform {
     private static long counter;
-    private final long id = count++;
+    private final long id = counter++;
     
     @Override
     public String toString() {
@@ -1041,7 +1041,7 @@ class FilterAdapter implements Processor {
     }
 }
 
-punlic class FilterProcessor {
+public class FilterProcessor {
     public static void main(String[] args) {
         Waveform w = new Waveform();
         Applicator.apply(new FilterAdapter(new LowPass(1.0)), w);