-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathFlatMap.java
More file actions
61 lines (47 loc) · 1.77 KB
/
FlatMap.java
File metadata and controls
61 lines (47 loc) · 1.77 KB
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
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
package map;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;
import dataclasses.Student;
public class FlatMap {
public static void main(String[] args) {
stringArray();
System.err.println("\n<------------------------------NEW METHOD------------------------------>");
setExample();
System.err.println("<------------------------------NEW METHOD------------------------------>");
primitiveTypeEx();
}
private static void stringArray() {
String[][] data = new String[][] {{"a","b"},{"c","d"},{"e","f"},{"g","h"}};
Stream<String[]> temp = Arrays.stream(data);
Stream<String> stringStream = temp.flatMap(x->Arrays.stream(x));
Stream<String> stream = stringStream.filter(x-> !"a".equals(x.toString()));
stream.forEach(System.out::print);
}
private static void setExample() {
Student obj1 = new Student();
obj1.setName("mkyong");
obj1.addBook("Java 8");
obj1.addBook("Java 9");
obj1.addBook("Effective Java");
Student obj2 = new Student();
obj2.setName("Mahmut");
obj2.addBook("Java 8");
obj2.addBook("Linux");
obj2.addBook("Pardus");
List<Student> stdList = new ArrayList<>();
stdList.add(obj1);
stdList.add(obj2);
List<String> collect = stdList.stream().map(x -> x.getBook()).flatMap(x->x.stream()).distinct().collect(Collectors.toList());
collect.forEach(x-> System.out.println(x));
}
private static void primitiveTypeEx() {
int[] intarr = {1,2,3,4,5,6,7,8,9};
Stream<int[]> streamArray = Stream.of(intarr);
IntStream intStream = streamArray.flatMapToInt(x -> Arrays.stream(x));
intStream.forEach(System.out::println);
}
}