-1– if the element is NOT found. 2. ArrayList lastIndexOf() Example The following Java program gets the last index of arraylist. In this example, we are looking for last occurrence of strings “alex” and “hello“. The String ‘alex‘ occurs thrice in the list, the second occurrence ...
The lastIndexOf() method is used to get the index of the last occurrence of an element in an ArrayList object.Package : java.utilJava Platform : Java SE 8 Syntax:lastIndexOf(Object o)Parameters:NameDescription o The element whose index is to be returned....
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Note: If the specified element doesn't exist in the list, the lastIndexOf() method returns -1. Example: Get the Last Occurrence of ArrayList Element import java.util.ArrayList; class Main { public static void main(String[] args) { // create an ArrayList ArrayList<String> languages = new...
peekLast() Method is available in java.lang package. peekLast()方法在java.lang包中可用。 peekLast() Method is used to return the last element of the queue denoted by this deque but without removing the element. peekLast()方法用于返回此双端队列表示的队列的最后一个元素,但不删除该元素。 pee...
ToLookup操作符将创建一个Lookup<TKey, TElement>对象,这是一个one-to-many集合,一个Key可以对应多个Value。以下的示例以产品表的所有数据作为数据源,以类别ID作为Key调用了ToLookup方法,然后遍历返回的Lookup<TKey, TElement>对象,输出了类别ID以及此类别下的所有产品名称: ...
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temp.add(">"); 上面的代码用于匹配括号,但我偶然发现了ArrayList方法lastIndexOf。但是,它并没有获取正确的索引,而是像indexOf方法一样工作。我应该使用堆栈还是link 浏览3提问于2020-04-09得票数 0 回答已采纳 2回答 包含lastIndexOf? 、、 有没有可能在lastIndexOf中使用java容器?我正在从一个文件中抓取一...