diff --git a/src/main/java/istlab/KisoJikken/JCompiler.java b/src/main/java/istlab/KisoJikken/JCompiler.java
index 5bd767f..e08fba0 100644
--- a/src/main/java/istlab/KisoJikken/JCompiler.java
+++ b/src/main/java/istlab/KisoJikken/JCompiler.java
@@ -14,7 +14,12 @@
     public JCompiler(String p) {
         absolutePath = p;
         thread = new Thread(this);
-        String[] ary = absolutePath.split(File.separator);
+        String[] ary;
+        if (File.separator.equals("\\")){
+            ary = absolutePath.split("\\\\");
+        } else {
+            ary = absolutePath.split(File.separator);
+        }
         for (int i = 0; i < ary.length; i++) {
             if (ary[i].equals("src")) {
                 pkgname = ary[i + 1];
diff --git a/src/main/java/istlab/KisoJikken/JExecutor.java b/src/main/java/istlab/KisoJikken/JExecutor.java
index 3c34ad6..b51ecce 100644
--- a/src/main/java/istlab/KisoJikken/JExecutor.java
+++ b/src/main/java/istlab/KisoJikken/JExecutor.java
@@ -14,7 +14,12 @@
     public JExecutor(String p) {
         absolutePath = p;
         thread = new Thread(this);
-        String[] ary = absolutePath.split(File.separator);
+        String[] ary;
+        if (File.separator.equals("\\")){
+            ary = absolutePath.split("\\\\");
+        } else {
+            ary = absolutePath.split(File.separator);
+        }
         for (int i = 0; i < ary.length; i++) {
             if (ary[i].equals("src")) {
                 pkgname = ary[i + 1];