关键字
class class class class class class class class class class class class
static static
void void void void void void void void void void void void void void void void
if
for for for for
while while while while while while while while while
do
default
byte
short
int
long
float
double double double double double double double double double
boolean boolean boolean boolean boolean
char char char
private private private private private private private
protected
switch
true
false false false false
throw
throws
try
catch