Clojure vs. Java

Java vs Java 8 vs Clojure

Java pre version 8:

public class StringUtils {   
  public static boolean isBlank(String str) {     
    int strLen;     
    if (str == null || (strLen = str.length()) == 0) {       
      return true;      
    }     
    for (int i = 0; i < strLen; i++) {       
      if ((Character.isWhitespace(str.charAt(i)) == false)) {   
        return false;        
      }     
    }     
    return true;    
  } 
}

Java 8:

boolean allBlank(String str) {
        return str.chars().allMatch( c -> Character.isWhitespace(c));
}

Clojure:

(defn blank? [s] (every? (fn [c] (Character/isWhitespace c)) s))

Re Clojure version, I think this could be simpler, like this:

(defn blank? [s] (every? Character/isWhitespace s))