complete tutorials on core java in java

A public class may be accessed outside of its package. A non-public class may not be accessed outside of its package. In Java, the access modifiers public, protected, package-private (default), and private are used to control the visibility and accessibility of classes, methods, and fields. When it comes to classes specifically, there are two main … Read more

A Scrollbar is a Component, but not a Container. A ScrollPane is a Container. A ScrollPane handles its own events and performs its own scrolling. In Java, particularly in graphical user interface (GUI) development using Swing, a Scrollbar and a ScrollPane are related components but serve different purposes. Scrollbar: A Scrollbar is a user interface element that allows users to scroll … Read more

Numeric promotion is the conversion of a smaller numeric type to a larger numeric type, so that integer and floating-point operations may take place. In numerical promotion, byte, char, and short values are converted to int values. The int values are also converted to long values, if necessary. The long and float values are converted to double values, as required. In Core Java, numeric promotion refers to the automatic … Read more

The exception propagates up to the next higher level try-catch statement (if any) or results in the program’s termination. In Java, a try-catch-finally statement must have either a catch clause or a finally clause (or both). If a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the … Read more

The ResourceBundle class is used to store locale-specific resources that can be loaded by a program to tailor the program’s appearance to the particular locale in which it is being run. The ResourceBundle class in Java is a part of the java.util package and is used for internationalization (i18n) and localization (l10n) of Java applications. It provides … Read more