Java 中的 DoubleStream 空()带示例
原文:https://www . geesforgeks . org/double stream-empty-Java-examples/
DoubleStream empty() 是 java.util.stream.DoubleStream 中的一个方法，这个方法返回一个空的顺序 DoubleStream。 语法:
static DoubleStream empty()
Where, DoubleStream is a sequence of primitive double-valued
elements and the function returns an empty sequential stream.
例 1 :
// Java code for DoubleStream empty()
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// creating an empty DoubleStream, a sequence of
// primitive double-valued elements
DoubleStream stream = DoubleStream.empty();
// Displaying an empty sequential stream
System.out.println(stream.count());
}
}
Output:
0
例 2 :
// Java code for DoubleStream empty()
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// creating an empty DoubleStream, a sequence of
// primitive double-valued elements
DoubleStream stream = DoubleStream.empty();
// Displaying an empty sequential stream
System.out.println(Arrays.toString(stream.toArray()));
}
}
Output:
[]
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