update,

it114105/itp4510/Lab01/Lab1.2/q2/Shape.java

@@ -0,0 +1,9 @@
+public abstract class Shape { // line 1
+    private String name; // line 2
+
+    public Shape(String name) { // line 3
+        this.name = name; // line 4
+    }
+
+    public abstract double area(); // line 5
+}