LongStream allMatch(LongPredicate謂詞)返回此流的所有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 allMatch(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:allMatch()函數來檢查是否所有元素都可以被3整除。
// Java code for LongStream allMatch
// (LongPredicate predicate) to check whether
// all elements 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 all elements of stream
// are divisible by 3 or not using
// LongStream allMatch(LongPredicate predicate)
boolean answer = stream.allMatch(num -> num % 3 == 0);
// Displaying the result
System.out.println(answer);
}
}
輸出:
false
示例2:allMatch()函數,用於檢查並置兩個LongStream之後獲得的LongStream中的所有元素是否小於2。
// Java code for LongStream allMatch
// (LongPredicate predicate) to check whether
// all elements 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(-2L, -4L, -6L, -8L),
LongStream.of(-1L, 0L, 1L, 5L));
// Check if all elements of stream
// are less than 2 or not using
// LongStream allMatch(LongPredicate predicate)
boolean answer = stream.allMatch(num -> num < 2);
// Displaying the result
System.out.println(answer);
}
}
輸出:
false
示例3:allMatch()函數,以顯示流是否為空,然後返回true。
// Java code for LongStream allMatch
// (LongPredicate predicate)) to check whether
// any 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();
boolean answer = stream.allMatch(num -> true);
// Displaying the result
System.out.println(answer);
}
}
輸出:
true
相關用法
- Java DoubleStream allMatch()用法及代碼示例
- Java Stream allMatch()用法及代碼示例
- Java IntStream allMatch()用法及代碼示例
- Java LongStream max()用法及代碼示例
- Java LongStream min()用法及代碼示例
- Java LongStream count()用法及代碼示例
- Java LongStream mapToInt()用法及代碼示例
- Java LongStream distinct()用法及代碼示例
- Java LongStream peek()用法及代碼示例
- Java LongStream noneMatch()用法及代碼示例
- Java LongStream anyMatch()用法及代碼示例
- Java LongStream average()用法及代碼示例
- Java LongStream filter()用法及代碼示例
- Java LongStream empty()用法及代碼示例
- Java LongStream reduce(long identity, LongBinaryOperator op)用法及代碼示例
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 allMatch() 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。