Java Extract a String from a String

Question

I am parsing a csv file with Apache Commons CSVRecord and CSVFormat in Java I got the following record in String format Records : CSVRecord [comment=null, mapping={Id=0, FirstName=1, LastName=2}, recordNumber=1, values=[1, John, Wayne]]

I need to extract the values only For ex: 1, John, Wayne

Used the following options to get the result.

String[] split = record.split("values=\\[");
String result = split[1].substring(0, split[1].length() - 2);

My Question is: Is there a better option(Faster) than this in Java?

Are you trying to parse CSVRecord.toString() value? What exactly are you doing? — Karol Dowbecki
– Karol Dowbecki, Commented May 29, 2019 at 15:31
What Karol said. Use one of the CSVRecord.get() methods or the CSVRecord.iterator() or CSVRecord.toMap() to acces the values — Aaron
– Aaron, Commented May 29, 2019 at 15:33
Trying to parse from the string representation has pitfalls in addition to being less performant. For instance @Guilherme's solution will fail if one of the values contains values=[ or , (the first one is unlikely, the second maybe less) — Aaron
– Aaron, Commented May 29, 2019 at 15:57

Guilherme · Accepted Answer · 2019-05-29 15:37:31Z

1

Try this:

String txt = "CSVRecord [comment=null, mapping={Id=0, FirstName=1, LastName=2}, recordNumber=1, values=[1, John, Wayne]]";

String[] sub = txt.substring(txt.indexOf("values=[")).split("[\\[\\]]");


System.out.println(sub[1]);

answered May 29, 2019 at 15:37

Guilherme

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