notes on core java in java

The purpose of the Runtime class is to provide access to the Java runtime system. The Runtime class in Java provides a way to interact with the Java Virtual Machine (JVM) at runtime. It allows you to get information about the runtime environment, execute system processes, and manage the application’s runtime behavior. Some of the key purposes … Read more

validate() method is used to cause a container to be laid out and redisplayed. In Java, the validate() method is used to cause a container to be laid out and redisplayed. The validate() method is part of the java.awt.Container class, and it is used to validate the container’s components and layout. It ensures that the components … Read more

The GregorianCalendar class provides support for traditional Western calendars. The GregorianCalendar class in Java is a concrete implementation of the abstract Calendar class and is part of the java.util package. It provides a standard implementation of the Gregorian calendar system, which is the calendar system used by most of the world. The Gregorian calendar is a solar … Read more

Box.Filler, Button, Canvas, Checkbox, Choice, Container, Label, List, Scrollbar, or TextComponent. In Java, the Component class is a part of the Abstract Window Toolkit (AWT) package, and it serves as the base class for all AWT components. Here are three subclasses of the Component class: Button: Button is a subclass of Component that represents a button that can trigger an action when pressed. Canvas: … Read more

If an expression involving the Boolean & operator is evaluated, both operands are evaluated. Then the &operator is applied to the operand. When an expression involving the && operator is evaluated, the first operand is evaluated. If the first operand returns a value of true then the second operand is evaluated. The && operator is then applied to the first and second … Read more