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POString out of bounds,
 

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    <p>This program is to use the keyboard keys to play notes. I get a different string index out of range for each key I press, ranging from 49 for the 1 to 109 for the m. but I always get this error message. I am new to Java, and any help would be appreciated since I've checked a bunch of forums and haven't found the answer to quite this kind of problem. </p> <p>The exception is thrown at this line: </p> <pre><code>nextnote = keyboard.charAt(key); </code></pre> <p> This is my code:</p> <pre><code>public class GuitarHero { public static void main(String[] args) { //make array for strings double[] notes = new double[37]; GuitarString[] strings = new GuitarString[37]; int nextnote; int firstnote=0; double NOTE = 440.0; String keyboard ="1234567890qwertyuiopasdfghjklzxcvbnm"; //for loop to set notes for(int i=0;i&lt;37;i++){ double concert = 440.0* Math.pow(2, (i-24)/12.0); notes[i] = concert; for(int j=0;j&lt;37;j++){ strings[j] = new GuitarString(concert); } } while (true) { // check if the user has typed a key; if so, process it if (StdDraw.hasNextKeyTyped()) { char key = StdDraw.nextKeyTyped(); //charAt gets index of character in string nextnote = keyboard.charAt(key); //make sure value is within string if(nextnote&gt;=0 &amp;&amp; nextnote&lt;37){ // pluck string and compute the superposition of samples strings[nextnote].pluck(); double sample = strings[firstnote].sample() +strings[nextnote].sample(); StdAudio.play(sample); // advance the simulation of each guitar string by one step strings[nextnote].tic(); firstnote=nextnote; } } } } } </code></pre>
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    1. USKevin
    1. USbitva
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    1. COwhat is the value of key when that is called? There are 37 characters in the String `keyboard`, the characters occupy indices 0-36. So if key is > than 36 or < 0 then you will get an `IndexOutOfBoundsException`
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      1. POString out of bounds,
      1. USHunter McMillen
 

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