Listing the Elements of a Collection
This example demonstrates how to iterate over the elements of various
types of collections.
// For a set or list
for (Iterator it=collection.iterator(); it.hasNext(); ) {
Object element = it.next();
}
// For keys of a map
for (Iterator it=map.keySet().iterator(); it.hasNext(); ) {
Object key = it.next();
}
// For values of a map
for (Iterator it=map.values().iterator(); it.hasNext(); ) {
Object value = it.next();
}
// For both the keys and values of a map
for (Iterator it=map.entrySet().iterator(); it.hasNext(); ) {
Map.Entry entry = (Map.Entry)it.next();
Object key = entry.getKey();
Object value = entry.getValue();
}
Post a comment