正则表达式查找字符串中不匹配的整数

Question

I have two tables' contents stored in Stringbuffers. One has data in it; the other is only a header. I converted the Stringbuffers into Strings and removed whitespace.

table1:

ACCOUNT_NUMBER;BRANCH_CODE;RECALC_ACTION_CODE;RECALC_DATE;PROCESS_NO;PRINCIPAL_CHG_AMXX23QRUP120970003;023;E;05.09.2013;1;-522.53

table2:

ACCOUNT_NUMBER;BRANCH_CODE;MSG_TYPE

I only want to proceed with a table if it has data in it, like table1. To check for data (ie integers) I used regex: table1.matches("\\\\d") , but this returns false. I also tried table1.matches("(?s)\\\\d")) , for new line character but even this returns false.

How can I check for integer data in the strings?

Answer 1

Read the documentation on matches . The "match" requires the entire string to match, and so your table1.matches("\\\\d") fails -- "table1" is not 'one digit only'.

Use table1.matches(".*\\\\d.*") instead. Note the double backslash! You might not be aware they need escaping in a String constant.