Why I hate Java, as demostrated in 251, assignment 4:

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Not functional:

b.addTerm(newvar, true);
if(!TryAllPossibilities(e1, e2, b, v))
   return false;
b.setTerm(newvar, false);
if(!TryAllPossibilities(e1, e2, b, v))
   return false;
return true;

instead of

return TryAllPossibilities(e1, e2, b.addTerm(newvar, true)) &&
       TryAllPossibilities(e1, e2, b.addTerm(newvar, false))

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char's aren't objects - can't be put in vectors

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((Character)(v.remove(0))).charValue();  - need I say more?

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Also, every single *Expression class must import java.util.vector

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javac file.java, yet java file; why not java file.class?

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System.out.println?  What's wrong with printf?

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Exception in thread "main" java.lang.AbstractMethodError:
expressions.DisjunctionExpression.getTermList()Ljava/util/Vector;

What?  On inserting debug info, it went away, and was replaced by a
comprehesnsible error message (see two below)

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Used v.add instead of v.addall for non-atomic expressions - have to modify all
5 files to make it work now.

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Java's auto-recompilation seems broken - it gives Exceptions, I fix them, they
still happen.  I put a System.out.println in a different file to debug, and it
suddenly works.

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Continuing from above - a file is not being recompiled.  Manually recompiling
it, it errors, since I forgot to import java.util.Vector.  I fix it, and
recompiling Driver still breaks.  I manually recompile it, and then stuff
works.