Java Regex - Remove White Spaces

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

public class Main {
   public static void main(String[] argv) 
   throws Exception {
      String ExString = "This is a Java program. 
      This is another Java Program.";
      String result=removeDuplicateWhitespace(ExString);
      System.out.println(result);
   }
   public static CharSequence removeDuplicateWhitespace(CharSequence inputStr) {
      String patternStr = "\\s+";
      String replaceStr = " ";
      Pattern pattern = Pattern.compile(patternStr);
      Matcher matcher = pattern.matcher(inputStr);
      return matcher.replaceAll(replaceStr);
   }
}

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class Main {

public static void main(String[] argv)

throws Exception {

String ExString = "This is a Java program.

This is another Java Program.";

String result=removeDuplicateWhitespace(ExString);

System.out.println(result);

}

public static CharSequence removeDuplicateWhitespace(CharSequence inputStr) {

String patternStr = "\\s+";

String replaceStr = " ";

Pattern pattern = Pattern.compile(patternStr);

Matcher matcher = pattern.matcher(inputStr);

return matcher.replaceAll(replaceStr);

}

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