-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathRemoveDuplicate.java
More file actions
34 lines (21 loc) · 839 Bytes
/
Copy pathRemoveDuplicate.java
File metadata and controls
34 lines (21 loc) · 839 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
package streams.problems;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
public class RemoveDuplicate {
public static void main(String[] args) {
List<String> list = Arrays.asList("A", "B", "C", "D", "A", "B", "C");
List<String> unique = list.stream().distinct().collect(Collectors.toList());
System.out.println(unique);
Set<String> unique2 = list.stream().collect(Collectors.toSet());
System.out.println(unique2);
ArrayList<Integer> numbersList
= new ArrayList<>(Arrays.asList(1, 1, 2, 3, 3, 3, 4, 5, 6, 6, 6, 7, 8));
Map<Object, Long> map = numbersList.stream().collect(Collectors.toMap(t -> t, v -> 1L, Long::sum));
System.out.println(map);
}
}