I want to find the following pattern in a file like
subclass "Pool1" 11:22:33:44:55:66 {
dynamic;
}
the above pattern I have to find in a file.
How can I find either using java or Unix command?
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Raptor
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Saxena Shekhar
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What part do you want to parse? How do you need the result? – Elliott Frisch Jun 16 '15 at 03:26
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the pattern I have mentioned subclass "Pool1" 11:22:33:44:55:66 { dynamic } in dhcpd.leases file – Saxena Shekhar Jun 16 '15 at 03:28
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maybe this can help http://stackoverflow.com/questions/10589929/find-the-line-number-where-a-specific-word-appears-with-grep – Dan Jun 16 '15 at 03:29
1 Answers
1
You can find like this.
File file = new File("data/pattern.txt");
Pattern pat = Pattern.compile("subclass \"Pool1\" 11:22:33:44:55:66 \\{\\s*dynamic;\\s*\\}");
String content = Files.lines(file.toPath()).collect(Collectors.joining("\n"));
Matcher m = pat.matcher(content);
while (m.find()) {
System.out.printf("found at %d-%d%n", m.start(), m.end());
}