diff --git a/java/src/boj11478/Main.java b/java/src/boj11478/Main.java
new file mode 100644
index 0000000..c45168c
--- /dev/null
+++ b/java/src/boj11478/Main.java
@@ -0,0 +1,33 @@
+package boj11478;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.HashSet;
+import java.util.Set;
+
+public class Main {
+
+    private static final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+
+    public static void main(String[] args) {
+        String input = readLine();
+        Set<String> set = new HashSet<>();
+
+        for (int i = 0; i < input.length(); i++) {
+            for (int j = i + 1; j <= input.length(); j++) {
+                set.add(input.substring(i, j));
+            }
+        }
+
+        System.out.println(set.size());
+    }
+
+    private static String readLine() {
+        try {
+            return reader.readLine();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}