Stack in Java

In Java, a stack is a data structure that operates on the principle of Last-In-First-Out (LIFO). This means that the last element added to the stack is the first one to be removed. It can be visualized as a stack of plates where the last plate added is the first one to be removed.

In Java, the Stack class is a part of the java.util package and provides methods like push(), pop(), peek(), empty() and search() for performing stack operations. Here's a brief overview of these methods:

• push(): This method adds an element to the top of the stack.

• pop(): This method removes and returns the element at the top of the stack. If the stack is empty, it throws an EmptyStackException.

• peek(): This method returns the element at the top of the stack without removing it. If the stack is empty, it throws an EmptyStackException.

• empty(): This method returns true if the stack is empty, otherwise it returns false.

• search(): This method returns the position of the specified element in the stack, counting from the top of the stack. If the element is not present in the stack, it returns -1.

Overall, the Stack class in Java provides an easy-to-use and efficient way of implementing stack data structures in Java programs.