diff --git a/README.md b/README.md
index 152d5f3..ed04acb 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ These are my attempts on [AoC 2022](https://adventofcode.com/2022/)
 | [04](day04)  |   ⭐   |   ⭐   | Haskell  |
 | [05](day05)  |   ⭐   |   ⭐   | Lua      |
 | [06](day06)  |   ⭐   |   ⭐   | Common Lisp |
-| 07           |        |        |          |
+| [07](day07)  |   ⭐   |   ⭐   | Java     |
 | 08           |        |        |          |
 | 09           |        |        |          |
 | 10           |        |        |          |
diff --git a/day07/README.md b/day07/README.md
index b32319b..bd89a5f 100644
--- a/day07/README.md
+++ b/day07/README.md
@@ -1,7 +1,40 @@
-Run with command:
+### Build
 
 ```
-mvn package && java -cp target/aoc07-1.0-SNAPSHOT.jar com.felixalb.app.App input.txt
+mvn package
 ```
 
+### Run
+```
+java -cp target/aoc07-1.0-SNAPSHOT.jar com.felixalb.app.App input.txt
+```
+
+### Read
 Code is located in `src/main/java/com/felixalb/app/`
+
+### Sample
+```
+$ java -cp target/aoc07-1.0-SNAPSHOT.jar com.felixalb.app.App input_demo.txt                                                                                                       [12:16:33]
+Lines: 23
+Commands: 10
+/ (48381165)
+|  a (94853)
+|  |  e (584)
+|  |  |  i (584)
+|  |  f (29116)
+|  |  g (2557)
+|  |  h.lst (62596)
+|  b.txt (14848514)
+|  c.dat (8504156)
+|  d (24933642)
+|  |  j (4060174)
+|  |  d.log (8033020)
+|  |  d.ext (5626152)
+|  |  k (7214296)
+
+Total size: 48381165
+
+
+Part 1: 95437
+Part 2: 24933642
+```