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Java

Posted by aroshinemunasinghe
aroshinemunasinghe
5,649 Points

Help to check my code. Convert every first word capital letter

public class test {
    public static void main(String[] args) {
        /**
         * Convert every first word to capital letter like hello world to Hello World
         **/

        start();
    }

    public static void start() {

        String hej = "hello world";
        String[] x = hej.split(" "); // ["hello", "world"]

        something(x);
    }

    public static String something(String[] x) {

        String d = ""; //TODO: here is the problem!
        for (int n = 0; n < x.length; n++) {
            d = x[n].toUpperCase().charAt(0) + x[n].substring(1);

        }// end outer loop
        return onTheWay(d); //TODO: It returns only the last word!
    }

    public static String onTheWay(String old) {
        //TODO: Not finished yet..
        String alpha = "abcdefghijklmnopqrstuvxyz";
        String convertedAlpha = alpha.toUpperCase(); 
        String r = "";

        for (int y = 0; y < convertedAlpha.length(); y++) {
            if (old.indexOf(0) == convertedAlpha.indexOf(y)) {
                r = old.concat(" ");
            }


        }//end inner for
        return result(r);
    }

    public static String result(String rOld) {
        System.out.print(rOld);
        return null;
    }


}//end class

The first problem is in the method something(...) When "hello" converted to "Hello" then it goes to global variable d and dissapared. I dont know how to solve it out to save result. I tried to move String d inside the for loop and the return too but it gave me the last word (=__=)

aroshinemunasinghe
aroshinemunasinghe
5,649 Points

Ronald Williams Thank you so much!!! Very clear explanation! Now I understand who d += do! :) I also removed other "junk" methods. All clean and clear! Thanks a lot!

1 Answer

Ronald Williams
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Ronald Williams
Java Web Development Techdegree Graduate 25,021 Points
Ronald Williams
.a{fill-rule:evenodd;}techdegree seal-36
Ronald Williams
Java Web Development Techdegree Graduate 25,021 Points 
public static String something(String[] x) {

        String d = ""; //TODO: here is the problem!
        for (int n = 0; n < x.length; n++) {
            d += x[n].toUpperCase().charAt(0) + x[n].substring(1) + " ";

        }// end outer loop
        return onTheWay(d); //TODO: It returns only the last word!
    }

In your something method, change the line in your for loop from d = to d +=. With just d = you are only storing the last entry of the for loop. Also at the end of the line in your for loop I add + " " so that it adds a space in there.

For example your method on the first run is saying d = Hello. Then on the second run it is saying actually, scratch that make d = World.

When you change it to d += on the first run it says d = Hello. Then on the second run d = d + World. The += means taker what d already equals is plus what you are trying to add.

Converted to an answer - Dane E. Parchment Jr. (Moderator)