Check whether element available in the ArrayList

I have an ArrayList and I've added elements to the ArrayList using mylist.add() method.

I've added around 10 elements and now I want to figure out whether an element is available in the ArrayList, if so what is the index position. How can I acheive this?? the contains method doesn't help.

I searched online but couldn't figure out a tutorial, may be i'm missin开发者_JS百科g the correct keywords in the search

Thanks for your time in advance.

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int pos = myList.indexOf(myElement);

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You can use .contains() to test whether an element is in the ArrayList, but it sounds like you want .indexOf() which will return the index of that Object.

See: http://download.oracle.com/javase/6/docs/api/java/util/ArrayList.html#indexOf(java.lang.Object)

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have a look at ArrayList.indexOf() [specified by List interface]

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Yes, you are looking for indexOf, returns -1 if no element present, see

http://download.oracle.com/javase/1.4.2/docs/api/java/util/ArrayList.html#indexOf(java.lang.Object)

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The following should do the trick:

int index = myList.indexOf(myObject);  // Returns -1 if not present.