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Categories >> Software >> Java Related >> Java J2EE >> Core Java
 
 


 

 
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Question
there are some duplicate values in ArrayList, how U'll get
that array with out duplicate?
 Question Submitted By :: Core-Java
I also faced this Question!!     Answer Posted By  
 
Answer
# 1


ArrayList list = new ArrayList();
list.add("a");
list.add("b");
list.add("a");
list.add("c");
list.add("b");
HashSet set = new HashSet(list);
list.clear();
list.addAll(set);
System.out.println("ArrayList : ");
for (Object data : list) {
System.out.println(data);
 
Is This Answer Correct ?    13 Yes 2 No
Sai
 
Answer
# 2
ArrayList list = new ArrayList();
list.add("a");
list.add("b");
list.add("a");
list.add("c");
list.add("b");
LinkedHashSet lset = new LinkedHashSet
(list);
list.clear();
list.addAll(lset);
System.out.println("ArrayList : ");
for (Object data : list) {
System.out.println(data);
 
Is This Answer Correct ?    5 Yes 0 No
Phani Raju
 
 
 
Answer
# 3
List<Integer> arlList=new ArrayList<Integer>();
arlList.add(20);
arlList.add(2);
arlList.add(1);
arlList.add(6);
arlList.add(6);
Set<Integer> tr=new TreeSet<Integer>(arlList);
Iterator<Integer> iterator=tr.iterator();
while(iterator.hasNext()){
System.out.println(iterator.next());
}
 
Is This Answer Correct ?    4 Yes 0 No
Shilpa
 
Answer
# 4
public void removeDuplicateDataFromArrayList(){
ArrayList<String> al = new ArrayList<>();
al.add("a");
al.add("b");
al.add("c");
al.add("c");
al.add("a");

HashSet<String> hs = new HashSet<>();
hs.addAll(al);
al.clear();
al.addAll(hs);
System.out.println("The ArrayList values are :"+ al);

// Or

System.out.println("ArrayList : ");
for (Object data : al) {
System.out.println(data);
}
 
Is This Answer Correct ?    0 Yes 0 No
Banti
 

 
 
 
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