Posted on 2006-11-05 17:50
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java基礎學習系列
import?
java.util.ArrayList;
import?
java.util.Iterator;
import?
java.util.ListIterator;
public?class?
MainClass?
{
??
public?static?
void?
main
(
String?args
[])?{
????
ArrayList<String>?al?=?
new?
ArrayList<String>
()
;
????
al.add
(
"C"
)
;
????
al.add
(
"A"
)
;
????
al.add
(
"E"
)
;
????
al.add
(
"B"
)
;
????
al.add
(
"D"
)
;
????
al.add
(
"F"
)
;
????
System.out.print
(
"Original?contents?of?al:?"
)
;
????
Iterator<String>?itr?=?al.iterator
()
;
????
while?
(
itr.hasNext
())?{
??????
String?element?=?itr.next
()
;
??????
System.out.print
(
element?+?
"?"
)
;
????
}
????
System.out.println
()
;
????
ListIterator<String>?litr?=?al.listIterator
()
;
????
while?
(
litr.hasNext
())?{
??????
String?element?=?litr.next
()
;
??????
litr.set
(
element?+?
"+"
)
;
????
}
????
//?Now,?display?the?list?backwards.
????
System.out.print
(
"Modified?list?backwards:?"
)
;
????
while?
(
litr.hasPrevious
())?{
??????
String?element?=?litr.previous
()
;
??????
System.out.print
(
element?+?
"?"
)
;
????
}
??
}