What are the built in packages in Java?

There are many built-in packages such as java, lang, awt, javax, swing, net, io, util, sql etc.

There are many built-in packages such as java, lang, awt, javax, swing, net, io, util, sql etc.

There are 5,000 or so classes built-in to Java, and programmers have written hundreds of thousands if not millions of their own.

There are 5,000 or so classes built-in to Java, and programmers have written hundreds of thousands if not millions of their own.

A built-in class is a class whose instances have restricted capabilities or special representations . Attempting to use defclass to define subclasses of a built-in class signals an error of type error. Calling make-instance to create an instance of a built-in class signals an error of type error.

A built-in class is a class whose instances have restricted capabilities or special representations . Attempting to use defclass to define subclasses of a built-in class signals an error of type error. Calling make-instance to create an instance of a built-in class signals an error of type error.

Built in functions in java are methods that are present in different API of JDK . For example cos(double a), exp(double a) etc are built in function of java present in java. lang. Math class.