More notes on Java.

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Access.

    private        class
    [default]      package
    protected      package or subclass
    public         program

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Reserved words that are used with reference types.

    null
    new
    instanceof
    super
    this

As a matter of style, I recommend that none of these reserved
words should be used in client code.  They should be used only
by code that implements a data type, and should only be used to
manipulate values of that data type.

As a matter of style, I recommend that instanceof not be used
at all.

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Program structure: files and directories.

Each class definition is compiled into a separate .class file,
which contains Java Virtual Machine (JVM) code.  These files
are compiled from the class definitions in .java files.  Most
.java files begin with package statement that specifies the
subdirectory in which the file belongs; a .java file that does
not begin with a package statement goes in the outermost
directory that contains the source code for the program.

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Control structures of Java.

    return          try
    break           catch
    continue        finally
    switch          throw
    case            throws
    default
    if
    else
    while
    do
    for

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Reserved words of Java.

package
import

abstract
class
interface
extends
implements

private
protected
public
static
final
synchronized
native
transient
volatile

boolean
char
byte
int
short
long
float
double
void

null
new
instanceof
super
this

return
break
continue
switch
case
default
if
else
while
do
for

try
catch
finally
throw
throws

const
goto

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