From c95abc31d62e296db4f1b537e3de440dd40defd1 Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Sun, 7 Dec 2025 12:22:07 +0100
Subject: Finish Java Kompendium book

---
 Java-Kompendium/kap21/1/BerechnenInterface.java |  3 +++
 Java-Kompendium/kap21/1/Main.java               | 10 ++++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 Java-Kompendium/kap21/1/BerechnenInterface.java
 create mode 100644 Java-Kompendium/kap21/1/Main.java

(limited to 'Java-Kompendium/kap21/1')

diff --git a/Java-Kompendium/kap21/1/BerechnenInterface.java b/Java-Kompendium/kap21/1/BerechnenInterface.java
new file mode 100644
index 0000000..ec36dba
--- /dev/null
+++ b/Java-Kompendium/kap21/1/BerechnenInterface.java
@@ -0,0 +1,3 @@
+public interface BerechnenInterface {
+    int berechnen(int x, int y);
+}
diff --git a/Java-Kompendium/kap21/1/Main.java b/Java-Kompendium/kap21/1/Main.java
new file mode 100644
index 0000000..3c34118
--- /dev/null
+++ b/Java-Kompendium/kap21/1/Main.java
@@ -0,0 +1,10 @@
+public class Main {
+    private static void print(BerechnenInterface lambda) {
+        System.out.println(lambda.berechnen(2, 3));
+    }
+
+    public static void main(String[] arguments) {
+        print((a, b) -> a + b);
+        print((a, b) -> a * b);
+    }
+}
-- 
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