ArrayList <整数>使用 get/remove 方法 [英] ArrayList &lt;Integer&gt; with the get/remove method

问题描述

当我在Java中使用ArrayList时，有一些我不明白的地方.这是我的初始化代码:

when I use ArrayList in Java, there are some things that I do not understand. Here is my initialization code:

 ArrayList<Integer> list = new ArrayList <Integer> ();
list.add (0);
list.add (1);

有时我需要通过索引删除一个对象:

sometimes I need to delete an object by its index:

list.remove (0) // delete the object in the first box

但有时我想按内容删除一个对象:

but sometimes I want to delete an object by its contents:

list.remove (0) // delete the object HAS Which value of 0

这段代码很模糊.为了澄清我想在代码中做什么，我指定了这样的类型:

this code is very ambiguous. To clarify what I want to do it in code, I specify the type like this:

list.remove ((Object) 0) // delete the object which has a value of 0

如果我没有AC，唯一知道调用了哪些方法的方法是将鼠标指针放在方法上查看:java.util.ArrayList.remove boolean (Object 对象)

If I do not AC, the only way to know which methods are called is to put the mouse pointer on the method to see: java.util.ArrayList.remove boolean (Object object)

Java 但是它有什么不同呢?有方法指针吗?有没有更明确的方法来做到这一点?

Java But how does it make difference? is there a method pointer? Is there a less ambiguous way to do this?

非常感谢，对不起我的英语.

thank you very much, sorry for my English.

PS:我应该说我终于使用了 SparseIntArray 但我很好奇

PS: I should say that I finally used SparseIntArray but I am curiously

推荐答案

对于状态者.List#remove(index) 返回从列表中删除的对象.List#remove(Object) 返回一个布尔值.

For staters. List#remove(index) returns the Object removed from the list. List#remove(Object) returns a boolean.

但是在这种特殊情况下.你可以.

In this special case however. you could do .

 ArrayList<Integer> list = new ArrayList <Integer> ();
        list.add (0);
        list.add (1);
        System.out.println(list.remove(new Integer(0)));

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