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| interface Iterator {
boolean hasNext();
Object next();
}
interface Container {
Iterator getIterator();
}
class NameRepository implements Container {
public String[] names = {"Robert", "John", "Julie", "Lora"};
@Override
public Iterator getIterator() {
return new NameIterator();
}
private class NameIterator implements Iterator {
int index;
@Override
public boolean hasNext() {
return index < names.length;
}
@Override
public Object next() {
if (this.hasNext()) {
return names[index++];
}
return null;
}
}
}
public class IteratorPatternDemo {
public static void main(String[] args) {
NameRepository namesRepository = new NameRepository();
for (Iterator iter = namesRepository.getIterator(); iter.hasNext(); ) {
String name = (String) iter.next();
System.out.println("Name : " + name);
}
}
}
|