import java
.util.Arrays
import java
.util.stream.IntStream
import java
.util.stream.Stream
public class Streams8 {
public static void main(String[] args) {
Arrays
.asList(
"a1",
"a2",
"a3")
.stream()
.findFirst()
.ifPresent(System
.out::println)
Stream
.of(
"a1",
"a2",
"a3")
.map(s -> s
.substring(
1))
.mapToInt(Integer::parseInt)
.max()
.ifPresent(System
.out::println)
IntStream
.range(
1,
4)
.mapToObj(i ->
"a" + i)
.forEach(System
.out::println)
Arrays
.stream(new int[] {
1,
2,
3})
.map(n ->
2 * n +
1)
.average()
.ifPresent(System
.out::println)
Stream
.of(
1.0,
2.0,
3.0)
.mapToInt(Double::intValue)
.mapToObj(i ->
"a" + i)
.forEach(System
.out::println)
}
}
转载于:https://www.cnblogs.com/bilaisheng/p/10210930.html
