Java中的 LongStream min() 示例
Java 8 中的Java .util.stream.LongStream 处理原始 long。它有助于以一种新的方式解决数组中的最大值,数组中的最小值,数组中所有元素的总和以及数组中所有值的平均值等问题。 LongStream min()返回描述此流的最小元素的 OptionalLong,如果此流为空,则返回一个空的可选项。
句法 :
OptionalLong() min()
Where, OptionalLong is a container object which
may or may not contain a long value.
示例 1:
// Java code for LongStream min()
import java.util.*;
import java.util.stream.LongStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// creating a stream
LongStream stream = LongStream.of(-9L, -18L, 54L,
8L, 7L, 14L, 3L);
// OptionalLong is a container object
// which may or may not contain a
// long value.
OptionalLong obj = stream.min();
// If a value is present, isPresent() will
// return true and getAsLong() will
// return the value
if (obj.isPresent()) {
System.out.println(obj.getAsLong());
}
else {
System.out.println("-1");
}
}
}
输出 :
-18
示例 2:
// Java code for LongStream min()
// to get the minimum value in range
// excluding the last element
import java.util.*;
import java.util.stream.LongStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// To find minimum in given range
LongStream stream = LongStream.range(50L, 75L);
// storing the minimum value in variable
// if it is present, else show -1.
long minimum = stream.min().orElse(-1);
// displaying the minimum value
System.out.println(minimum);
}
}
输出 :
50
示例 3:
// Java code for LongStream min()
// to get the minimum value in range
// excluding the last element
import java.util.*;
import java.util.stream.LongStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// To find minimum in given range
LongStream stream = LongStream.range(50L, 50L);
// storing the minimum value in variable
// if it is present, else show -1.
long minimum = stream.min().orElse(-1);
// displaying the minimum value
System.out.println(minimum);
}
}
输出 :
-1