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Pattern MULTILINE field in Java with examples
Enables multiline mode in general, the ^ and $ meta characters matches the start and end of the given input with the specified characters irrespective of the number of lines in it.
Example 1
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MULTILINE_Example {
public static void main( String args[] ) {
//String regex = "(^This)";//.*t$)";
String input = "2234 This is a sample text\n"
+ "1424 This second 2335 line\n"
+ "This id third 455 line\n"
+ "Welcome to Tutorialspoint\n";
Pattern pattern = Pattern.compile("^([0-9]+).*");//, Pattern.MULTILINE);
Matcher matcher = pattern.matcher(input);
while(matcher.find()) {
System.out.println(matcher.group(1));
}
}
}
Output
2234
When you use this as flag value to the compile() method, the whole inputs sequence will be treated as a single line and the meta characters ^ and $ matches the beginning and end of the given input sequence.
Example 2
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MULTILINE_Example {
public static void main( String args[] ) {
//String regex = "(^This)";//.*t$)";
String input = "2234 This is a sample text\n"
+ "1424 This second 2335 line\n"
+ "This id third 455 line\n"
+ "Welcome to Tutorialspoint\n";
Pattern pattern = Pattern.compile("^([0-9]+).*", Pattern.MULTILINE);
Matcher matcher = pattern.matcher(input);
while(matcher.find()) {
System.out.println(matcher.group(1));
}
}
}
Output
2234 1424
Updated on: 05-Dec-2023
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