Remove all vowels in a string with Java

Question

I am doing a homework assignment for my Computer Science course. The task is to get a users input, remove all of the vowels, and then print the new statement.

I kno

Answer 1

I don't think your instructor wanted you to call Character.isLetter('a') because it's always true.

The simplest way of building the result without regexp is using a StringBuilder and a switch statement, like this:

String s = "quick brown fox jumps over the lazy dog";
StringBuffer res = new StringBuffer();
for (char c : s.toCharArray()) {
    switch(c) {
        case 'a': // Fall through
        case 'u': // Fall through
        case 'o': // Fall through
        case 'i': // Fall through
        case 'e': break; // Do nothing
        default: // Do something
    }
}
s = res.toString();
System.out.println(s);

You can also replace this with an equivalent if, like this:

if (c!='a' && c!='u' && c!='o' && c!='i' && c!='e') {
    // Do something
}