DoubleStream anyMatch(DoublePredicate謂詞)返回此流的任何元素是否與提供的謂詞匹配。如果不一定要確定結果,則可能不會評估所有元素上的謂詞。這是短路端子操作。如果出現無限輸入時,端子操作可能會在有限時間內終止,則該端子操作會發生短路。
用法:
boolean anyMatch(DoublePredicate predicate)
參數:
- DoublePredicate : 一個雙值參數的謂詞(布爾值函數)。
返回值:如果流中的任何元素與提供的謂詞匹配,則該函數返回true,否則返回false。
注意:如果流為空,則返回false,並且不對該謂詞求值。
示例1:anyMatch()函數,用於檢查列表中的任何元素是否滿足給定條件。
// Java code for DoubleStream anyMatch
// (DoublePredicate predicate) to check whether
// any element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating an DoubleStream
DoubleStream stream = DoubleStream.of(1.2, 2.3,
3.4, 4.5, 5.6, 6.7);
// Stream anyMatch(DoublePredicate predicate)
boolean answer = stream.anyMatch(num -> (num - 5) > 0);
// Displaying the result
System.out.println(answer);
}
}
輸出:
true
示例2:anyMatch()函數,用於檢查流中任何元素的平方根是否大於8。
// Java code for DoubleStream anyMatch
// (DoublePredicate predicate) to check whether
// any element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating an DoubleStream
DoubleStream stream = DoubleStream.of(10.3, 20.4, 30.5,
40.9, 50.4);
// Stream anyMatch(DoublePredicate predicate)
boolean answer = stream.anyMatch(num -> Math.sqrt(num) > 8);
// Displaying the result
System.out.println(answer);
}
}
輸出:
false
示例3:anyMatch()函數,以顯示如果流為空,則返回false。
// Java code for DoubleStream anyMatch
// (DoublePredicate predicate) to check whether
// any element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating an empty DoubleStream
DoubleStream stream = DoubleStream.empty();
boolean answer = stream.anyMatch(num -> true);
// Displaying the result
System.out.println(answer);
}
}
輸出:
false
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注:本文由純淨天空篩選整理自Sahil_Bansall大神的英文原創作品 DoubleStream anyMatch() in Java with examples。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。