diff --git "a/docs/java/Java\347\250\213\345\272\217\350\256\276\350\256\241\351\242\230.md" "b/docs/java/Java\347\250\213\345\272\217\350\256\276\350\256\241\351\242\230.md"
index 6f41a9cfa810deafc14de5257e4a284bb769ef8d..5ca87c6050cc95dfa4b43cc3b66250c442618027 100644
--- "a/docs/java/Java\347\250\213\345\272\217\350\256\276\350\256\241\351\242\230.md"
+++ "b/docs/java/Java\347\250\213\345\272\217\350\256\276\350\256\241\351\242\230.md"
@@ -73,7 +73,7 @@ public class MyStack {
 
     //TODO：返回栈顶元素并出栈
     private int pop() {
-        if (count == -1)
+        if (count == 0)
             throw new IllegalArgumentException("Stack is empty.");
         count--;
         return storage[count];