Re: delete repeated letters in a word

spidey12345 wrote:
ok, fine, i am using hashset:)

but which function in there allow me to delete repeated values or 0,
that is not character

Why do you use an array? You don't even need a HashSet if speed doesn't matter.

Untested (I even didn't tried to compile it) code:

public String removeDuplicateLetters( String word ) {
if ( word == null )
return null;

StringBuilder builder = new StringBuilder();
for ( int i = 0, n = word.length(); i < n; i++ ) {
String sub = word.substring(i,i+1);
if ( builder.indexOf(sub) == -1 )
builder.append(sub);
}

return builder.toString();
}

If you want to use a HashSet due to performance reasons the only thing you'd have to replace is the if-condition and of course, you'd have to add the element to the Set.

Bye
Michael
.

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