Stacks

• Stacks

  • LIFO: last in, first out data structure
• creating a stack

  import java.util.Stack;

  Stack<String>callStack=newStack<String>();
• Stack .push() method

  • add an element to the top of the stack
  • callStack.push("main");
• stack .pop() method

  • remove an element from the top of the stack and returns that element
• stack .peek() method


  return the element at the top of the stack