What is the use of bin and lib in JDK?

Bin contains all tools such as javac, appletviewer, awt tool, etc., whereas lib contains API and all packages.

What is casting?– Casting is used to convert the value of one type to another.

In the context of the Java Development Kit (JDK), the “bin” and “lib” directories serve different purposes:

  1. bin (binary): This directory contains binary executable files. In the context of Java, it typically includes command-line tools and utilities that are essential for Java development and execution. For example, the “java” executable is found in the “bin” directory, and it is used to run Java applications.
  2. lib (library): This directory contains libraries (JAR files) that are used by the Java development tools and runtime environment. It includes core Java class libraries and other supporting libraries that are necessary for Java applications to run. The “lib” directory often contains files like “rt.jar” (runtime library) and other JARs that provide essential classes and resources.

In summary, the “bin” directory houses executable files, while the “lib” directory contains libraries required for Java development and execution.