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Print Matchingwords using Regular expression
This Example describe the way
to print the matching word from the file using Regularexpression.
The steps involved in matching are described below:-
Step1:- Create a text
file and writes some text to it.The text file I have created here is:-
D.txt
Angeles Angeles Angeles Angeles Angeles Angeles
Angele Angele Angele
Angele Angele Angele
Angele Angele Angele
Angel Angel Angel Angel
Angel Angel
Angel Angel
Angel Angel
Angel
Ange Ange Ange Ange Ange Ange Ange
Ange Ange
Ange dcjk
4645423 24221 224121 5245241
55241 542541 441 5541 41441 |
Pattern pattern =
Pattern.compile("[0-9]+"):-This method compiles the given regular
expression into a pattern.[0-9] is the range to be compiled.In other
words means include all the digit form range 1 to 9.
Matcher matcher =
pattern.matcher(text):-Creates a matcher that will match the given
input against this pattern.Here text is the input.
Print_matching_word.java
import java.util.regex.*;
import java.io.*;
public class Print_matching_word {
public static void main(String[] args) throws Exception {
Pattern pattern = Pattern.compile("[0-9]+");
BufferedReader br = new BufferedReader
(new FileReader("/home/girish/Desktop/D.txt"));
String text;
System.out.println("Words
with digit 1 to 9 are:");
while ((text = br.readLine()) != null) {
Matcher matcher =pattern.matcher(text);
while (matcher.find()) {
int start = matcher.start(0);
System.out.println(text.substring(start));
}
}
}
}
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Output
of the program:-
Words with digit 1 to 9 are:
4645423
24221
224121
5245241
55241
542541
441
5541
41441 |
Download Source Code
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