myAL.Remove( "lazy" ); // Displays the current state of the ArrayList. Console.WriteLine( "After removing \"lazy\":" ); PrintValues( myAL ); // Removes the element at index 5. myAL.RemoveAt( 5 ); // Displays the current state of the ArrayList. Console.WriteLine( "After removing...
myAL.RemoveAt( 5 ); // Displays the current state of the ArrayList. Console.WriteLine( "After removing the element at index 5:" ); PrintValues( myAL ); // Removes three elements starting at index 4. myAL.RemoveRange( 4, 3 ); // Displays the current state of the ArrayList. Consol...
publicE remove(intindex) { rangeCheck(index);//先判断数组是否越界 modCount++; E oldValue=elementData(index); //处理数据intnumMoved = size - index - 1; //remove方法是将原数组的指定下标位置后面的值复制好然后再覆盖原有的指定下标位置,再将最后的一个置为空方便gc 调用的system.arraytcopy publi...
1.1、for循环中使用remove(int index),列表从前往后遍历 首先看一下ArrayList.remove(int index)的源码,读代码前先看方法注释:移除列表指定位置的一个元素,将该元素后面的元素们往左移动一位。返回被移除的元素。 源代码也比较好理解,ArrayList底层是数组,size是数组长度大小,index是数组索引坐标,modCount是被修改次数...
1 remove源码 在ArrayList源码里,remove有两个方法,一个是按照索引index移除元素,另一个是按照值移除元素。 按索引移除 /** * Removes the element at the specified position in this list. * Shifts any subsequent elements to the left (subtracts one from their * indices). * * @param index the in...
好吧那我们定位到remove()方法的实现来看看: /** * Removes the element at the specified position in this list. * Shifts any subsequent elements to the left (subtracts one from their * indices). * * @param index the index of the element to be removed ...
remove(int index) 点进去第一个remove方法: /*** Removes the element at the specified position in this list.* Shifts any subsequent elements to the left (subtracts one from their* indices).** @param index the index of the element to be removed* @return the element that was removed from...
arr.remove("d"); } }); } 虽然均为删除,但是简化版的for循环还有函数式循环下就不能删除呢?往下看... 三.普通删除做了什么 这是ArrayList的remove源码: public E remove(intindex) { rangeCheck(index); modCount++; E oldValue = elementData(index); ...
public static void remove1(ArrayList<String> list, String elem) { // 方法一:普通for循环正序删除,删除过程中元素向左移动,不能删除重复的元素 for (int i = 0; i < list.size(); i++) { if (list.get(i).equals(elem)) { list.remove(list.get(i)); ...
at com.wiceflow.collection.List.ListRemove.main(ListRemove.java:18) 1. 2. 3. 4. 分析源码揭开它的秘密 我们知道,forEach循环其实是走list的迭代器进行遍历的,我们先看ArrayList内部的forEach方法。 在ArrayList中有一个内部类Itr实现了Iterator,还有一个ListItr继承了Itr(这个类初始化的时候会将 ArrayList ...