我正在尝试将字符串转换为双重类型:
Double no_of_leaves_form=Double.parseDouble(leaveapplyform.getNo_of_leaves());
数据库中NO_of_leaves的数据类型为varchar。但我得到了以下错误:
java.lang.NullPointerException
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:991)
at java.lang.Double.parseDouble(Double.java:510