LinkedBlockingDeque的removeIf()方法从此LinkedBlockingDeque中删除满足指定条件的元素。
用法:
public boolean removeIf (Predicate<? super E> filter)
参数:此方法接受强制性参数过滤器,该过滤器是基于从此双端队列中删除哪些元素的谓词值。
返回值:如果更改了LinkedBlockingDeque,则此方法返回布尔值,例如true。否则,此方法返回false。
异常:如果指定的谓词过滤器为null,则此方法将引发NullPointerException。
以下示例程序旨在说明LinkedBlockingDeque类的removeIf()函数:
示例1:
// Java Program Demonstrate removeIf()
// method of LinkedBlockingDeque
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws InterruptedException
{
// Create object of LinkedBlockingDeque
LinkedBlockingDeque<Integer> LBD
= new LinkedBlockingDeque<Integer>();
// Add numbers to end of LinkedBlockingDeque
LBD.add(7855642);
LBD.add(35658786);
LBD.add(5278367);
LBD.add(74381793);
// Print Deque
System.out.println("Linked Blocking Deque: "
+ LBD);
// If a number in the List is
// divisible by 3, then remove it
LBD.removeIf(number -> number % 3 == 0);
System.out.println("Linked Blocking Deque: "
+ LBD);
}
}
输出:
Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793] Linked Blocking Deque: [7855642, 5278367]
示例2:
// Java Program Demonstrate removeIf()
// method of LinkedBlockingDeque
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws InterruptedException
{
// Create object of LinkedBlockingDeque
LinkedBlockingDeque<Integer> LBD
= new LinkedBlockingDeque<Integer>();
// Add numbers to end of LinkedBlockingDeque
LBD.add(7855642);
LBD.add(35658786);
LBD.add(5278367);
LBD.add(74381793);
// Print Dequeue
System.out.println("Linked Blocking Deque: "
+ LBD);
try {
// if the predicate is null,
// then it will throw NullPointerException
LBD.removeIf(null);
}
catch (Exception e) {
System.out.println(e);
}
}
}
输出:
Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793] java.lang.NullPointerException
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注:本文由纯净天空筛选整理自ProgrammerAnvesh大神的英文原创作品 LinkedBlockingDeque removeIf() method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。