diff --git a/algs4/extract-algs4 b/algs4/extract-jars
similarity index 70%
rename from algs4/extract-algs4
rename to algs4/extract-jars
index 936fce0..f887701 100755
--- a/algs4/extract-algs4
+++ b/algs4/extract-jars
@@ -4,3 +4,4 @@ set -e
 
 cd src/java
 jar xf ../../algs4.jar
+jar xf ../../stdlib.jar
diff --git a/algs4/src/java/.gitignore b/algs4/src/java/.gitignore
index 62c62db..0570439 100644
--- a/algs4/src/java/.gitignore
+++ b/algs4/src/java/.gitignore
@@ -130,3 +130,25 @@
 /WeightedQuickUnionUF.java
 /WhiteFilter.java
 /Whitelist.java
+/BinaryIn.java
+/BinaryOut.java
+/BinaryStdIn.java
+/BinaryStdInTester.java
+/BinaryStdOut.java
+/BinaryStdOutTester.java
+/Copy.java
+/Draw.java
+/DrawListener.java
+/In.java
+/InTest.txt
+/Out.java
+/Picture.java
+/StdArrayIO.java
+/StdAudio.java
+/StdDraw.java
+/StdDraw3D.java
+/StdIn.java
+/StdOut.java
+/StdRandom.java
+/StdStats.java
+/mandrill.jpg