Collections: Difference between revisions
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Line 796:
<lang java5>List arrayList = new ArrayList();
arrayList.add(new Integer(0));
// alternative with primitive autoboxed to an Integer object automatically
arrayList.add(0);
//other features of ArrayList
//define the type in the arraylist, you can substitute a proprietary class in the "<>"
//add several values to the arraylist to be summed later
int sum;
for(int i = 0; i < 10; i++) {
myarrlist.add(i);
}</lang>
<lang java5>//loop through myarrlist to sum each entry
for ( i = 0; i < myarrlist.size(); i++) {
sum += myarrlist.get(i);▼
▲ sum+=myarrlist.get(i);
}</lang>
or
<lang java5>for(int i : myarrlist) {
sum += i;
}</lang>
Line 834 ⟶ 833:
|by key
|hash
|forward (separate iterators for entries, keys and values)
|-
|TreeMap
|by key
|ascending(key)
|forward (separate iterators for entries, keys and values)
|-
|LinkedHashMap
|by key
|insertion
|forward (separate iterators for entries, keys and values)
|-
|LinkedList
| |||