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--- cs257e17:proj2 [2017/03/03 17:39]
scarl
+++ cs257e17:proj2 [2021/03/09 14:58]
scarl
@@ Line 1: / Line 1: @@
-It appears Java 8 has tightened up rules on casting. To fix some of the problems:
+It appears newer versions of Java tightened up rules on casting. To fix some issues I've seen:
-Prefer calling **superclass** methods to accessing the protected instance variables. For example:
+In ''dump'', trying to output members of the ''elements'' array can cause casting errors at runtime. A simple workaround is
-<code java>
-   short x, y, z;
-   x = super.top();
-   super.pop();
-   y = super.top();
-   super.pop();
-   z = (short) x + y;
-</code>
-In dump, trying to output members of the ''elements'' array can cause casting errors at runtime. A simple workaround is
 <code java>
@@ Line 19: / Line 9: @@
 }
 </code>
+When using inheritance, prefer calling **superclass** methods to accessing protected instance variables. For example:
+<code java>
+   short x, y, z;
+   x = super.top();
+   super.pop();
+   y = super.top();
+   super.pop();
+   z = (short) (x + y); // cast because type of the result is int
+</code>

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