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An ArrayList is a data structure. It stores data in an array that can be dynamically resized. This data structure in Microsoft .NET Framework contains Methods that assist the programmer in accessing and storing data within the ArrayList. The following link explains the .NET ArrayList class. http://msdn2.microsoft.com/en-us/library/system.collections.arraylist(vs.80).aspx

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What are the requirements to download a java arraylist?

The requirements to download a java arraylist are a pc with java software installed. A java arraylist is used to store a group of elements in a specific order.


How can you convert ArrayList to Vector?

Both of these types of Collections allow for a new instance to be created with the contents of another Collection. // This method will accept a Vector and return a new ArrayList which contains all elements of that Vector static ArrayList toArrayList(Vector v) { return new ArrayList(v); } // This method will accept an ArrayList and return a new Vector which contains all elements of that ArrayList static Vector toArrayList(ArrayList al) { return new Vector(al); }


What is reference data types in java?

A reference variable is used to refer to (or access) an object. A reference variable is declared to be of a specific type and that type can never be changed. Ex: ArrayList lst = new ArrayList(); The above line creates a reference variable lst which refers to an ArrayList object


How many number of objects we can store in an ArrayList. Is there any limit?

No. there is actually no such limit in any of the collections in java. The arraylist and vector are the most commonly used collections and they take thousands of objects. I have personally used them with atleast a 100,000 thousand objects.


How can you sort an arraylist of strings?

You can sort an ArrayList by using the sort method of the Collecions class (java.util.Collections). Assuming you have an ArrayList called foo: Collections.sort(foo);


What type of platform does Arraylist Java run on?

Arraylist Java runs on Oracle which is a relational data management database produced by the Oracle Corporation. Arraylist Java has been part of the Java framework ever since Java 5.


What happens when you pass an object as an argument to addAll fucntion of arraylist?

If the passed object extends Collection, then all the objects in collection are added to the arraylist.


How you can store a class variables in array list?

An (non generic) arrayList in java can save any type of object (in this case your class variable) in this straightforward way: MyClass myClassVar = new MyClass(); ArrayList myArrayList = new ArrayList(); myArrayList.add(myClassVar);


What advantage does the Java ArrayList class have over the Arrays class?

The biggest advantage of an ArrayList is that it can expand in size to fit more data. So, if you don't know how many data values you are going to have, you can construct an ArrayList. Whenever you use the add() method, the object will be added to the ArrayList, regardless of the current size. An Array does not have this advantage. When you construct an Array of size n, the array will always be that size.


What does the java new operator do?

The new keyword tells Java that you want to create a new instance of a class by invoking one of the constructors for that class.// Create a new, empty String objectString s1 = new String();// Create a new String object with a different constructorString s2 = new String("howdy");


What are advantages of an arraylist?

ArrayList Features In Java Index based – Elements can be randomly accessed using index . Arraylist Index start with ‘0’. Ordered – Elements maintain insertion ordered . Dynamic resizing – increase size dynamically when more elements needs to be added than it’ current size. Non synchronized – is not synchronized, by default.. Duplicates allowed – We can add duplicate elements . null value – Arraylist can store null values.


Can you serialize the ArrayList class in Java?

The ArrayList class itself is serializable and will serialize if it contains only serializable objects.If, however, you add non-serializable objects into the list then it will not serialize, but will throw a NotSerializableException.