gistfile1.java

// ru.dolzhenko.lambda.iterators.StringIterator
package ru.dolzhenko.lambda.iterators;

import java.util.Iterator;

/**
 * StringIterator
 * 
 * @author Vladimir Dolzhenko, [email protected]
 */
public final class StringIterator implements Iterator<Character> {

	private int pos = 0;
	private final String s;
	
	private StringIterator(final String s) {
		this.s = s;
	}
	
	@Override
	public boolean hasNext() {
		return this.s != null && this.pos < this.s.length();
	}
	
	@Override
	public Character next() {
		return this.s.charAt(this.pos++);
	}
	
	@Override
	public void remove() {
		throw new UnsupportedOperationException();
	}
	
	public static StringIterator stringIterator(final String s){
		return new StringIterator(s != null ? s : "");
	}
}