Java 中的流构建器()，示例
原文:https://www.geeksforgeeks.org/stream-builder-java-examples/
流构建器()返回一个流的构建器。
语法:
static <T> Stream.Builder<T> builder()
where, T is the type of elements.
返回值:一个流构建器。
例 1 :
// Java code for Stream builder()
import java.util.*;
import java.util.stream.Stream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Using Stream builder()
Stream.Builder<String> builder = Stream.builder();
// Adding elements in the stream of Strings
Stream<String> stream = builder.add("Geeks").build();
// Displaying the elements in the stream
stream.forEach(System.out::println);
}
}
输出:
Geeks
例 2 :
// Java code for Stream builder()
import java.util.*;
import java.util.stream.Stream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Using Stream builder()
Stream.Builder<String> builder = Stream.builder();
// Adding elements in the stream of Strings
Stream<String> stream = builder.add("Geeks")
.add("for")
.add("Geeks")
.add("GeeksQuiz")
.build();
// Displaying the elements in the stream
stream.forEach(System.out::println);
}
}
输出:
Geeks
for
Geeks
GeeksQuiz
例 3 :
// Java code for Stream builder()
import java.util.*;
import java.util.stream.Stream;
import java.util.stream.Collectors;
class GFG {
// Driver code
public static void main(String[] args)
{
// Using Stream builder()
Stream.Builder<String> builder = Stream.builder();
// Adding elements in the stream of Strings
Stream<String> stream = builder.add("GEEKS")
.add("for")
.add("Geeks")
.add("GeEKSQuiz")
.build();
// Converting elements to Lower Case
// and storing them in List list
List<String> list = stream.map(String::toLowerCase)
.collect(Collectors.toList());
// Displaying the elements in list
System.out.println(list);
}
}
输出:
[geeks, for, geeks, geeksquiz]
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