import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = " +";
final String string = "The European l a n g u a g es ar e members of the same fa m i l y \n"
+ ". Their sep a rate e xi ste nce is a myth . F or s c i e n c e , music, \n"
+ "sport , etc, Europe uses the s a m e v oca bula ry. The languages o n l y d \n"
+ "i f f e r i n t heir grammar, their pro nu n c iation and their most common \n"
+ "words. Everyone realizes why a new common language would be desirable: one could \n"
+ "refuse to pay expensive translators.";
final String subst = "(@)";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
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