If I have a string, e.g.
setting=value
How can I remove the '=' and turn that into two separate strings containing 'setting' and 'value' respectively?
Thanks very much!
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2 Answers
Two options spring to mind.
The first split()s the String on =:
String[] pieces = s.split("=", 2);
String name = pieces[0];
String value = pieces.length > 1 ? pieces[1] : null;
The second uses regexes directly to parse the String:
Pattern p = Pattern.compile("(.*?)=(.*)");
Matcher m = p.matcher(s);
if (m.matches()) {
String name = m.group(1);
String value = m.group(2);
}
The second gives you more power. For example you can automatically lose white space if you change the pattern to:
Pattern p = Pattern.compile("\\s*(.*?)\\s*=\\s*(.*)\\s*");
Comments
You don't need a regular expression for this, just do:
String str = "setting=value";
String[] split = str.split("=");
// str[0] == "setting", str[1] == "value"
You might want to set a limit if value can have an = in it too; see the javadoc
2 Comments
polygenelubricants
That is using regular expression, though. For example, if you want to split on
?, you can't just str.split("?"). You'd have to escape it to str.split("\\?").
Michael Mrozek
Ah yes, I forgot Java's String.split takes a regular expression; most languages split on a string