0
Does an ArrayList object automatically expand in size to accommodate the items stored in it?
Wiki User
∙ 10y ago
Yes
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
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 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 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");
How do you Implement a Stack using an ArrayList in java?
Just add the elements to the end of the ArrayList, and take them out from the end of the ArrayList. Use the .add() method to add an element to the end; use the .size() method to find out how many elements it has (so you can access the last element), and use the .remove() method to eliminate this last element.
How can you create array of an object in java?
Array's can hold only primitive data types. if you want a collection of objects you must use an ArrayList or a Vector.
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 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.
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 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 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");
How do you Implement a Stack using an ArrayList in java?
Just add the elements to the end of the ArrayList, and take them out from the end of the ArrayList. Use the .add() method to add an element to the end; use the .size() method to find out how many elements it has (so you can access the last element), and use the .remove() method to eliminate this last element.
Can you expand 2:718'264?
[object Object]
If you heat an object it will?
expand
How can you create array of an object in java?
Array's can hold only primitive data types. if you want a collection of objects you must use an ArrayList or a Vector.
Heating causes an object to?
expand
What is an Arraylist used for?
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
.....will be automatically Invoked when an object is created?
The Class object is automatically created by the JVM when an object is created. The Class object provides information about the Class and is primarily used by the IDEs and factory classes. The method that is automatically called when an object is created is called a constructor. In Java, the constructor is a method that has the same name as the class.
