public class StringUtil {
public static void replaceBlank()
{
Pattern p = Pattern.compile(\\s*|\t|\r|\n);
String str="I am a, I am Hello ok, \n new line ffdsa!";
System.out.println("before:"+str);
Matcher m = p.matcher(str);
String after = m.replaceAll("");
System.out.println("after:"+after);
}
public static void main(String[] args) {
replaceBlank();
}
}