list是不断变化的,list.remove(i)并不是都是删掉的第一个元素,动态数组跟静态数组最大的区别就是动态数组的存储空间是不断变化的,而静态数组是一成不变的 比方说,循环执行第一次的时候,i=0,list.remove(0),把第一个元素a111删掉了,这时候list只有5个元素了,下标只能是0~4,[b111, c111, e111, f111,...
Learn to clear arraylist or empty an arraylist in Java. Clearing a list means to remove all elements from the list. Difference between clear and removeAll.
b.get(0)---> a 其实这里就是a对象了（而且已经被clear）,然后你继续get(0),a对象已经被你clear()了，那么会报错是理所应当的，并不是b的元素被清理掉了，b的元素就是b.get(0)
@Test public void sortTest(){ List<Integer> list = createData(); list.iterator().forEachRemaining(i -> System.out.print(String.valueOf(i) + "、")); System.out.println(); list.sort((a, b) -> b.compareTo(a)); // 置为倒序 list.iterator().forEachRemaining(i -> System.out.pr...
2.单纯的把值赋予对方方式多种。如下: 方式一: ArrayList B = new ArrayList<> (A); 方式二: ArrayList B = A.clone(); 方式三: ArrayList B = new ArrayList<String>(); B.addAll(A); 方式四: for(String s: A) B.add(s); 文章转自...
deflen(*args,**kwargs):# real signature unknown""" Return the number of items in a container. """pass 3、代码示例 - 列表元素统计 代码示例 : 代码语言:javascript 代码运行次数:0 运行 AI代码解释 """ 列表List 常用操作 代码示例"""
Remove all items from a list: import java.util.LinkedList; public class Main { public static void main(String[] args) { LinkedList<String> cars = new LinkedList<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("Mazda"); cars.clear(); System.out.println...
print('List:', list) Run Code Output List: [] Note: If you are using Python 2 or Python 3.2 and below, you cannot use the clear() method. You can use the del operator instead. Example 2: Emptying the List Using del # Defining a list list = [{1, 2}, ('a'), ['1.1', ...
all|classes|functions|global|import|java|mex|variables Type of items to clear, specified as one of the following. Value ofItemTypeItems ClearedNotes Variables in scopeScripts and functionsClass definitionsPersistent variablesMEX functionsGlobal variablesImport listJava classes on the dynamic path ...
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