diff --git a/kasutus07.java b/kasutus07.java
new file mode 100644
index 0000000..e16379a
--- /dev/null
+++ b/kasutus07.java
@@ -0,0 +1,6 @@
+public class kasutus07{
+    public static void main(String[] args) {
+        liides07 kuupjuureArvutaja = new kodutoo07();
+        System.out.println("Kuupjuur arvust on: "+ kuupjuureArvutaja.f(125));
+    }
+}
\ No newline at end of file
diff --git a/kodutoo07.java b/kodutoo07.java
new file mode 100644
index 0000000..bd595fc
--- /dev/null
+++ b/kodutoo07.java
@@ -0,0 +1,5 @@
+public class kodutoo07 implements liides07{
+    public double f(double x){
+        return Math.cbrt(x);
+    }
+}
\ No newline at end of file
diff --git a/liides07.java b/liides07.java
new file mode 100644
index 0000000..fb04d35
--- /dev/null
+++ b/liides07.java
@@ -0,0 +1,3 @@
+public interface liides07{
+    public double f(double x);
+}
\ No newline at end of file