Posted on 2007-11-12 19:04
oahiq.Max 阅读(3309)
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Java
JDK1.4
Map map = new HashMap() ;
Iterator it = map.entrySet().iterator() ;
while (it.hasNext())
{
Map.Entry entry = (Map.Entry) it.next() ;
Object key = entry.getKey() ;
Object value = entry.getValue() ;
}
JDK1.5
Map m = new HashMap();
for (Object o : map.keySet()) {
map.get(o);
}
// 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();
}