List in Java provides the facility to maintain the ordered collection. It contains the index-based methods to insert, update, delete and search the elements. It can have the duplicate elements also. We can also store the null elements in the ...

ArrayList and LinkedList both implements List interface and maintains insertion order. Both are non synchronized classes. However, there are many differences between ArrayList and LinkedList classes that are given below. ArrayList LinkedList 1) ArrayList internally uses a dynamic array to ...

Java LinkedList class uses a doubly linked list to store the elements. It provides a linked-list data structure. It inherits the AbstractList class and implements List and Deque interfaces. The important points about Java LinkedList are: Java LinkedList class can ...

Java ArrayList class uses a dynamic array for storing the elements. It is like an array, but there is no size limit. We can add or remove elements anytime. So, it is much more flexible than the traditional array. It ...

The Panel is a simplest container class. It provides space in which an application can attach any other component. It inherits the Container class. It doesn’t have title bar. AWT Panel class declaration Java AWT Panel Example Output: ...

We can close the AWT Window or Frame by calling dispose() or System.exit() inside windowClosing() method. The windowClosing() method is found in WindowListener interface and WindowAdapter class. The WindowAdapter class implements WindowListener interfaces. It provides the default implementation of all ...

Java adapter classes provide the default implementation of listener interfaces. If you inherit the adapter class, you will not be forced to provide the implementation of all the methods of listener interfaces. So it saves code. Pros of using Adapter ...

The Java WindowListener is notified whenever you change the state of window. It is notified against WindowEvent. The WindowListener interface is found in java.awt.event package. It has three methods. WindowListener interface declaration The declaration for java.awt.event.WindowListener interface is shown below: ...

The Java KeyListener is notified whenever you change the state of key. It is notified against KeyEvent. The KeyListener interface is found in java.awt.event package, and it has three methods. Interface declaration Following is the declaration for java.awt.event.KeyListener interface: Methods ...

The Java ItemListener is notified whenever you click on the checkbox. It is notified against ItemEvent. The ItemListener interface is found in java.awt.event package. It has only one method: itemStateChanged(). itemStateChanged() method The itemStateChanged() method is invoked automatically whenever you ...