❶ java a大於等於並且a小於等於
①a的值大於等於b並且小於等於c
②a的值大於等於b或a的值小於等於c
❷ java中的運算符都有哪些
有這些，可以看看下面的網址：
http://www.sojson.com/operation.html#java_
postfix expr++expr--
unary ++expr --expr +expr -expr ~ !
multiplicative * / %
additive + -
shift << >> >>>
relational < > <= >= instanceof
equality == !=
bitwise AND &
bitwise exclusive OR ^
bitwise inclusive OR |
logical AND &&
logical OR ||
ternary ? :
assignment = += -= *= /= %= &= ^= |= <<= >>= >>>=