Java Exercise : How to write a method to delete all the blanks from the parameters?

Write a method to delete all blanks from its parameter. 

The method signature is:

   public static String deblank(String s);

Sample output:

   deblank("abc") returns "abc" (ie, no changes)
   deblank("I'm feeling fine.") returns "I'mfeelingfine."
 
 

Solution 1 - Using charAt

public static String deblank(String s) {
    String result = "";
    for (int i=0; i<s.length(); i++) {
        if (s.charAt(i) != ' ') {
            result = result + s.charAt(i);
        }
    }
    return result;
}

Solution 2 - Using substring

public static String deblank(String s) {
    String result = "";
    for (int i=0; i<s.length(); i++) {
        if (!s.substring(i, i+1).equals(" ")) {
            result = result + s.substring(i, i+1);
        }
    }
    return result;
}

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