Example usage for java.util ArrayDeque removeFirstOccurrence

Introduction

In this page you can find the example usage for java.util ArrayDeque removeFirstOccurrence.

Prototype

public boolean removeFirstOccurrence(Object o) 

Source Link

Document

Removes the first occurrence of the specified element in this deque (when traversing the deque from head to tail).

Usage

From source file:Main.java

public static void main(String[] args) {

    ArrayDeque<Integer> deque = new ArrayDeque<Integer>(8);

    deque.add(3);//w  w w.  j  av a 2 s. c om
    deque.add(1);
    deque.add(25);
    deque.add(1);

    // this will remove first occurrence of element 1
    deque.removeFirstOccurrence(1);

    System.out.println(deque);
}

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From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testRemoveFirstOccurrence() {
    Object o1 = new Object();
    Object o2 = new Object();
    Object o3 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    assertFalse(deque.removeFirstOccurrence(o1));

    deque.add(o1);//from w ww  .j a  v a  2s.c o  m
    assertTrue(deque.removeFirstOccurrence(o1));
    assertTrue(deque.isEmpty());

    deque = new ArrayDeque<>();
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    assertTrue(deque.removeFirstOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o3);

    deque = new ArrayDeque<>();
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    assertTrue(deque.removeFirstOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o3, o1, o2, o3);
    assertTrue(deque.removeFirstOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o3, o1, o3);
    assertTrue(deque.removeFirstOccurrence(o1));
    checkDequeSizeAndContent(deque, o3, o1, o3);
    assertTrue(deque.removeFirstOccurrence(o1));
    checkDequeSizeAndContent(deque, o3, o3);
    assertFalse(deque.removeFirstOccurrence(o1));

    assertFalse(deque.removeFirstOccurrence(null));
}

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