import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "(?sx)\n"
+ "(?|\n"
+ "０(?=.*(0))\n"
+ "|１(?=.*(1))\n"
+ "|２(?=.*(2))\n"
+ "|３(?=.*(3))\n"
+ "|４(?=.*(4))\n"
+ "|５(?=.*(5))\n"
+ "|６(?=.*(6))\n"
+ "|７(?=.*(7))\n"
+ "|８(?=.*(8))\n"
+ "|９(?=.*(9))\n"
+ ")";
final String string = "０ zero \n"
+ "１ ichi \n"
+ "２ ni \n"
+ "３ san \n"
+ "４ shi \n"
+ "５ go\n"
+ "６ roku\n"
+ "７ shichi\n"
+ "８ hachi\n"
+ "９ kyuu\n"
+ "0123456789";
final String subst = "\\1";
final Pattern pattern = Pattern.compile(regex, Pattern.DOTALL | Pattern.COMMENTS);
final Matcher matcher = pattern.matcher(string);
// The substituted value will be contained in the result variable
final String result = matcher.replaceAll(subst);
System.out.println("Substitution result: " + result);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html