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POConverting a sentence to an array and delete characters and print new sentence
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copied!<p>DISCLAIMER: This is a homework assignment </p> <p>Goal of the program is: ask a sentence and then: - convert upper to lowercase <strong>(without using .toLowercase() )</strong> - remove all characters that are not a-z, A-Z and 0-9 - print new sentence - ... something more BUT not important for. </p> <p>Ok, so what I did. </p> <ul> <li>I converted my String (sentence) to a char array. </li> <li>I created a for loop to loop through all chars in my array</li> <li>If a char is a uppercase I converted it to a lowercase using ASCII</li> </ul> <p>The problem I experience is: - It looks like I change the char C but it's NOT stored as a lowercase in my array? - How do I detect the non-allowed characters, and delete this from my array?</p> <p>My code: </p> <pre><code>import java.util.Scanner; public class sentence { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String zin = ""; System.out.print("Voer een zin in: "); if (scanner.hasNextLine()) zin = scanner.nextLine().trim(); if (zin.equals("")) { System.out.print("Geen Invoer!"); System.exit(0); } char[] zinArray = zin.toCharArray(); for (int i = 0; i < zinArray.length; i++) { char c = zinArray[i]; if (c >= 'A' && c <= 'Z') { c = (char)(c + 32); } else if (c >= 58 && c <= 64) { } else if (c >= 91 && c <= 96) { } else if (c 123 && c <= 126) { } } } } </code></pre> <p>Can anyone point me in the right direction? </p> <p>Thanks :)</p>

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