notes on core java in java

Clipping is the process of confining paint operations to a limited area or shape. In the context of Core Java, “clipping” typically refers to the process of limiting the drawing of graphical elements to a certain region or boundaries. This is often associated with graphical user interface (GUI) programming where you may have a component, … Read more

Window. In Java, the immediate superclass of the Dialog class is the Window class. The Dialog class is a subclass of the Window class, which is itself a subclass of the Container class. This hierarchy is part of the Java Abstract Window Toolkit (AWT) package and represents GUI components for building graphical user interfaces.

The readLine() method returns null when it has reached the end of a file. In Java, the readLine() method is typically associated with reading data from a BufferedReader or a similar class that reads characters from a stream. When readLine() reaches the end of a file, it returns null. Here’s a simple example using BufferedReader: java import java.io.BufferedReader; import … Read more

The Canvas, Frame, Panel, and Applet classes support painting. In Core Java, three Component subclasses that support painting are: javax.swing.JPanel: JPanel is a lightweight container that is often used to group other components and provide a space for custom painting. java.awt.Canvas: Canvas is a component that allows for custom graphics drawing. You can subclass Canvas and override its paint method … Read more

Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Under time slicing, a task executes for a predefined slice of time and then reenters the pool of ready tasks. The scheduler then determines which task should execute next, based on … Read more