Answers By Category

- Demonstration Java files included.

- Demonstration applet included.

Compile errors

ELSE without IF
String not terminated at end of line
Undefined variable: <name>
Undefined variable or class name: <name>
Invalid type expression
Method <name> not found in class <class name>
Incompatible type for <thing>. Can't convert <type> to <other type>
Incompatible type for <thing>. Explicit cast needed to convert <type> to <another type>
Unbalanced parentheses
Missing term
Attempt to reference method <method name> in class <class name> as an instance variable.
Statement not reached
'case' or 'default'outside switch statement
Method <name> requires a method body. otherwise declare it as abstract
Return required
Attempt to reference field <name> in a <array>
[] can only be applied to arrays. It can't be applied to <type>
Array index required.
Reference to variable <variable> in class <class> as if it were a method
Method <type> <name> requires a method body. Otherwise declare it abstract.
Catch not reached
"class" or "interface" keyword expected
<type> cannot be dereferenced.
Missing method body, or declare abstract

Runtime errors

Dealing with array out of bounds.
Null pointer exceptions

Basic stuff

What is the null string?
Using ++ and --
Hello World

Everything else

How do you check if two strings are equal?
What's the difference between Java and JavaScript?
Wrong number of arguments in method
Making Your Own Exceptions
Making Your Own Classes
Focus on: arrays
Making applets
Switch statements
Public, private and protected
Basic types
Random Numbers
Static
void
"<char>" Vs '<char>'
Using += , -= , *= , /= and %=
Using <<, >> and >>>

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