Java流count()方法与示例
使用Javastreamcounting()方法对流中的元素数进行计数。以下是实现JavaStreamscounting()方法的示例-
示例
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class Demo {
public static void main(String[] args) {
Stream<String> stream = Stream.of("Kevin", "Jofra","Tom", "Chris", "Liam");
//数
long数 = stream.collect(Collectors.counting());
System.out.println("Number of elements in the stream = "+count);
}
}输出结果
Number of elements in the stream = 5
让我们看看另一个例子，其中我们有整数元素流-
示例
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class Demo {
public static void main(String[] args) {
Stream<Integer> stream = Stream.of(5, 10, 20, 40, 80, 160);
//数
long数 = stream.collect(Collectors.counting());
System.out.println("Number of elements in the stream = "+count);
}
}输出结果
Number of elements in the stream = 6