substring method

[lmit]

Hi All,

Am trying to extract substring from a string like Adult (18-60 years)

i should get the output as Adult from the above string

I used method

column_name == null || column_name == ""?

null

:

column_name..substring(column_name.lastIndexOf(" ")+1)

but am getting below error

java.lang.StringIndexOutOfBoundsException: String index out of range: -1

Can someone please suggest what wrong am doing

Thanks in advance,

lmit

[Anonymous · Accepted solution]

Hello lmit,

To get the Adult from the above string, you can try:

column_name.substring(0,5)

or

column_name.split(" ")[0]

Best regards

Aiming

[ThWabi]

Hello lmit,

please do not use == operator to compare Strings in Java, use

column_name.equals("")

or

column_name.isEmpty()

Does your input data contain Strings without a blank? Perhaps the IndexOutOfBounds-Exception occurs in those cases.

For your example input "Adult (18-60 years)", the substring- and lastIndexOf-Methods would yield "years)", because the substring starts at the last blank (+1) in the string and extends to the end. May I suggest

column_name.substring(0, column_name.indexOf(" ") -1)

Best regards,

Thomas

[lmit]

Thanks @Aiming Chen​