字符串型怎么转换成浮点或双精度并计算啊?String To Double/Float请问: 字符串型怎么转换成浮点或双精度并计算啊? [解决办法]String s = "123.456 "; double d = Double.parseDouble(s); float f = Float.parseFloat(s);[解决办法]Double.parseDouble(String str); Float.parseFloat(String str);