tasks a-s

Task/Polymorphic-copy/Java/polymorphic-copy.java

@@ -0,0 +1,24 @@
+class T implements Cloneable {
+    public String name() { return "T"; }
+    public T copy() {
+        try {
+            return (T)super.clone();
+        } catch (CloneNotSupportedException e) {
+            return null;
+        }
+    }
+}
+
+class S extends T {
+    public String name() { return "S"; }
+}
+
+public class PolymorphicCopy {
+    public static T copier(T x) { return x.copy(); }
+    public static void main(String[] args) {
+        T obj1 = new T();
+        S obj2 = new S();
+        System.out.println(copier(obj1).name()); // prints "T"
+        System.out.println(copier(obj2).name()); // prints "S"
+    }
+}