diff --git a/Java_6.java b/Java_6.java
index 8b13789..87a2c36 100644
--- a/Java_6.java
+++ b/Java_6.java
@@ -1 +1,73 @@
+/**
+ * Java. level 1. Lesson 6. Example of homework, extend OOP
+ * autor Rudenko Alexander
+ * version date 09/12/2018
+ *
+ */
 
+class java_6 {
+    public static void main(String[] args) {
+
+        IAnimal[] animals = {new Cat(200, 0, 2.0), new Dog(500, 10, 0.5)};
+        for (IAnimal animal : animals) {
+            System.out.println(animal);
+            System.out.println(animal.getClass().getName() +
+                    " может: пробежать " + animal.running(200) +
+                    ", " + "проплыть " + animal.swiming(0) +
+                    ", " + "прыгнуть на " + animal.jumping(1.0));
+        }
+    }
+}
+
+class Cat extends Animal {
+    Cat(int run, int swim, double jump) {
+        super(run, swim, jump);
+    }
+    public boolean running(int run) {
+        return (run >= 100 & run <= 250);
+    }
+    public boolean swiming(int swim) {
+        return (swim != 0);
+    }
+    public boolean jumping(double jump) {
+        return (jump == 0.5);
+    }
+}
+
+class Dog extends Animal {
+    Dog(int run, int swim, double jump) {
+        super(run, swim, jump);
+    }
+    public boolean running(int run) {
+        return (run >= 400 & run <= 600);
+    }
+    public boolean swiming(int swim) {
+        return (swim == 10);
+    }
+    public boolean jumping(double jump) {
+        return (jump == 2.0);
+    }
+}
+
+interface IAnimal {
+    boolean running(int run);
+    boolean swiming(int swim);
+    boolean jumping(double jump);
+}
+
+abstract class Animal implements IAnimal {
+    int run;
+    int swim;
+    double jump;
+
+    Animal(int run, int swim, double jump) {
+        this.run = run;
+        this.swim = swim;
+        this.jump = jump;
+    }
+
+    @Override
+    public String toString() {
+        return run + ", " + swim + ", " + jump;
+    }
+}