Get specific ArrayList item

问题

public static ArrayList mainList = someList;

How can I get a specific item from this ArrayList? mainList[3]?

回答1:

As many have already told you:

mainList.get(3);

Be sure to check the ArrayList Javadoc.

Also, be careful with the arrays indices: in Java, the first element is at index 0. So if you are trying to get the third element, your solution would be mainList.get(2);

回答2:

Time to familiarize yourself with the ArrayList API and more:

ArrayList at Java 6 API Documentation

For your immediate question:

mainList.get(3);

回答3:

mainList.get(list_index)

回答4:

mainList.get(3);

For future reference, you should refer to the Java API for these types of questions:

http://download.oracle.com/javase/1.4.2/docs/api/java/util/ArrayList.html

It's a useful thing!

回答5:

We print the value using mainList.get(index) where index starts with '0'. For Example: mainList.get(2) prints the 3rd element in the list.

回答6:

You can simply get your answer from ArrayList API doc.

Please always refer API documentation .. it helps

Your call will looklike following :

mainList.get(3);

Here is simple tutorial for understanding ArrayList with Basics :) :

http://www.javadeveloper.co.in/java/java-arraylist-tutorial.html

回答7:

Try:

ArrayListname.get(index);

Where index is the position in the index and ArrayListname is the name of the Arraylist as in your case is mainList.

回答8:

I have been using the ArrayListAdapter to dynamically put in the entries into the respective fields ; This can be useful , for future queries

 AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();

And then , you can fetch any arraylist item as below :

arrayListName(info.position);

来源：https://stackoverflow.com/questions/3920602/get-specific-arraylist-item

标签

java

arraylist