Java中的 ArrayDeque removeLastOccurrence() 方法
Java中的Java .util.ArrayDeque.removeLastOccurrence( Object ) 方法用于从该双端队列中删除特定元素的最后一次出现。如果元素只存在一次,则删除该元素并返回 true。如果没有删除这样的元素,则返回 false。
句法:
Array_Deque.removeLastOccurrence(Object O)
参数:该方法采用一个 ArrayDeque 类型的参数O ,它指的是要删除最后一次出现的元素。
返回值:如果元素存在于 Deque 中,则此方法返回 true,否则返回 false。
下面的程序说明了Java.util.ArrayDeque.removeLastOccurrence() 方法:
程序 1 :
// Java code to illustrate removeLastOccurrence()
import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
// Creating an empty ArrayDeque
Deque de_que = new ArrayDeque();
// Use add() method to add elements into the Deque
de_que.add("Welcome");
de_que.add("To");
de_que.add("Geeks");
de_que.add("For");
de_que.add("Geeks");
// Displaying the ArrayDeque
System.out.println("Initial ArrayDeque: " + de_que);
// Removing elements using removeLastOccurrence() method
de_que.removeLastOccurrence("Geeks");
de_que.removeLastOccurrence("For");
// Displaying the ArrayDeque after removal
System.out.println("ArrayDeque after removing "
+ "elements: " + de_que);
}
}
输出:
Initial ArrayDeque: [Welcome, To, Geeks, For, Geeks]
ArrayDeque after removing elements: [Welcome, To, Geeks]
方案二:
// Java code to illustrate removeLastOccurrence()
import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
// Creating an empty ArrayDeque
Deque de_que = new ArrayDeque();
// Use add() method to add elements into the Deque
de_que.add(10);
de_que.add(15);
de_que.add(30);
de_que.add(20);
de_que.add(5);
// Displaying the ArrayDeque
System.out.println("Initial ArrayDeque: " + de_que);
// Removing elements using removeLastOccurrence() method
de_que.removeLastOccurrence(30);
de_que.removeLastOccurrence(5);
// Displaying the ArrayDeque after removal
System.out.println("ArrayDeque after removing "
+ "elements: " + de_que);
}
}
输出:
Initial ArrayDeque: [10, 15, 30, 20, 5]
ArrayDeque after removing elements: [10, 15, 20]