I have a file containing lots of lines. I want to find a specific line starting with "msql".
I have tried many regex combinations but not get any idea.
Pattern pattern = Pattern.compile("^msql");
Matcher matcher = pattern.matcher(s);
or
s.matches("^(msql).*$") or s.matches("^msql")
please suggest correct regex for finding a line start with "msql".
EDIT:-
i have file data like this:-
eventlogger 0 0 1 1 1 10
expireserv 0 0 1 1 1 10 "
partEOLserv 0 0 1 1 1 10
msqlpdmm81dd 0 0 25 25 25
and my code.
String s = br.readLine();
while (s != null) {
//Pattern pattern = Pattern.compile("^msql");
//("^(msql).*$")
//Matcher matcher = pattern.matcher(s);
System.out.println(s);
if (s.startsWith("msql")) {
System.out.println(s);
}
s = br.readLine();
}
still am not able to find line.
I think you are reading only first line and hence no match found.
public static void main(String[] args) throws Exception {
File f = new File("example.txt");
BufferedReader br = new BufferedReader(new FileReader(f));
String temp = null;
while ((temp=br.readLine())!=null) {
if (temp.startsWith("msql")){
System.out.println("Match found: "+temp);
}
}
}
and output is Match found: msqlpdmm81dd 0 0 25 25 25
Your regex for matching the content is correct. I do not know why are you facing problem. I have tried your program and it is working.
I m adding the code with regex below.
BufferedReader br = new BufferedReader(new FileReader("<filepath\\filename.extension>"));
String s;
while ((s = br.readLine()) != null) {
if (s.matches("^(msql).*$")){
System.out.println(s);
} else {
System.out.println("didnt matched");
}
}
You can also check the condition using
if (s.startsWith("msql"))
This is also working fine.
I have created an text file in my local and saved your data in it. And I m getting the following output.
didnt matched
didnt matched
didnt matched
msqlpdmm81dd 0 0 25 25 25
I think this should work.
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