java中的基本数据类型?各占多少位?多少字节?取值范围答:long 64 8 -9,223,372,036,854,775,808~+9,223,372,036,854,775,807 float 32 4 -3,40292347E+38 ~ +3,40292347E+38 double 64 8 -1.79769313486231576E+308 ~ 1.79769313486231576E+308 char 16 2 -128~127 boolean 1 0.125 true/false by...