Java ArrayList从指定的索引中删除元素 java.util.ArrayList类中的remove(int index)方法会移除该列表中指定位置的元素,并将任何后续元素向左移动(即从其索引中减一)。 语法: public removed_element remove(int index) 参数: 要删除的元素的索引。 返回值: 该方法
ArrayList<String>arraylist2=newArrayList<>();//1 - Remove an element from the specified index positionarraylist.remove(indexPosition);//2 - Remove the first occurence of element by its valuearraylist.remove(element);//3 - Remove all elements of the specified collection from arraylistarraylist.remo...
remove(b); 1. 2. 3. 4. 5. 这两次调用到底访问的是哪个remove方法呢,第一次remove会不会a自动装箱成Integer类型,访问remove(Object o)呢?第二次remove会不会b自动拆箱成int类型,访问remove(int index)呢? 答案肯定是否定的,编译器在编译的时候,发现执行remove(a),有相应的remove方法与之匹配,就不会进行...
Here, we have used theremove()method to remove the elementJavafrom the arraylist. Example 2: Remove the Element From the Specified Position importjava.util.ArrayList;classMain{publicstaticvoidmain(String[] args){// create an ArrayListArrayList<String> languages =newArrayList<>();// insert element...
2. Examples to remove an element from ArrayList 2.1. Removing only the First Occurrence of the Element Java program to remove an object from an ArrayList usingremove()method. In the following example, we invoke theremove()method two times. ...
leave the collection unmodifiedintremoveCount=0;finalBitSetremoveSet=newBitSet(size);finalintexpectedModCount=modCount;finalintsize=this.size;for(inti=0; modCount == expectedModCount && i < size; i++) {@SuppressWarnings("unchecked")finalEelement=(E) elementData[i];if(filter.test(element)) {...
list.remove(str); } } 异常如下: Exception in thread "main" java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) at java.util.ArrayList$Itr.next(ArrayList.java:851) at com.lifeisftc.collection.list.ArrayListRemoveError.main(ArrayListRemoveError...
}/*** Returns the index of the first occurrence of the specified element * in this list, or -1 if this list does not contain the element. * More formally, returns the lowest index i such that * (o==null ? get(i)==null : o.equals(get(i))), * or -1 if there is ...
* @return the element that was removed from the list * @throws IndexOutOfBoundsException {@inheritDoc} */ public E remove(int index) { rangeCheck(index); modCount++; E oldValue = elementData(index); int numMoved = size - index - 1; ...
* @return the element that was removed from the list * @throws IndexOutOfBoundsException @inheritDoc */ public E remove(int index) rangeCheck(index); modCount++; E oldValue = elementData(index); int numMoved = size - index - 1; ...