LongStream noneMatch(LongPredicate謂詞)返回此流中是否沒有元素與提供的謂詞匹配。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 noneMatch(LongPredicate predicate)
參數:
- LongPredicate : 一個long值參數的謂詞(布爾值函數)。
返回值:如果流中的所有元素都與提供的謂詞匹配,或者流為空,則該函數返回true,否則返回false。
注意:如果流為空,則返回true,並且不評估謂詞。
示例1:noneMatch()函數,用於檢查LongStream的元素是否可被5整除。
// Java code for LongStream noneMatch
// (LongPredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.LongStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating an LongStream
LongStream stream = LongStream.of(3L, 5L, 9L, 12L, 14L);
// Check if no element of stream
// is divisible by 5 using
// LongStream noneMatch(LongPredicate predicate)
boolean answer = stream.noneMatch(num -> num % 5 == 0);
// Displaying the result
System.out.println(answer);
}
}
輸出:
false
示例2:noneMatch()函數,用於檢查將兩個LongStream串聯後獲得的LongStream中的元素是否不小於2。
// Java code for LongStream noneMatch
// (LongPredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.LongStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating an LongStream after concatenating
// two LongStreams
LongStream stream = LongStream.concat(LongStream.of(3L, 4L, 5L, 6L),
LongStream.of(7L, 8L, 9L, 10L));
// Check if no element of stream
// is less than 2 using
// LongStream noneMatch(LongPredicate predicate)
boolean answer = stream.noneMatch(num -> num < 2);
// Displaying the result
System.out.println(answer);
}
}
輸出:
true
示例3:noneMatch()函數,以顯示流是否為空,然後返回true。
// Java code for LongStream noneMatch
// (LongPredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.LongStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating an empty LongStream
LongStream stream = LongStream.empty();
// Using LongStream noneMatch() on empty stream
boolean answer = stream.noneMatch(num -> true);
// Displaying the result
System.out.println(answer);
}
}
輸出:
true
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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 LongStream noneMatch() 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。