A.先用數(shù)值的valueOf函數(shù)將字符串轉(zhuǎn)換為數(shù)值類對(duì)象，再利用該對(duì)象的intValue或doubleValue等函數(shù)將數(shù)值類對(duì)象轉(zhuǎn)換為數(shù)值
B.利用數(shù)值類的parseInt，parseDouble等函數(shù)將字符串直接轉(zhuǎn)換為數(shù)值
C.利用數(shù)值類的靜態(tài)函數(shù)valueOf將字符串轉(zhuǎn)換為數(shù)值
D.利用數(shù)值類的靜態(tài)函數(shù)intValue將字符串轉(zhuǎn)換為數(shù)值
E.利用字符串對(duì)象的toString函數(shù)將字符串轉(zhuǎn)換為數(shù)值