Match a single digit : Digit Number « Regular Expressions « Java

1. Java
2. Regular Expressions
3. Digit Number

Match a single digit

 

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
  public static void main(String args[]) {
    // match a single digit
    Pattern p = Pattern.compile("\\d");
    Matcher matcher = p.matcher("5");
    boolean isOk = matcher.matches();
    System.out.println("original pattern matches " + isOk);

    // recycle the pattern
    String tmp = p.pattern();
    Pattern p2 = Pattern.compile(tmp);
    matcher = p.matcher("5");
    isOk = matcher.matches();
    System.out.println("second pattern matches " + isOk);
  }
}

   
  

Related examples in the same category