Stack. Examine the item most recently added. ====> LIFO = "last in first out" (push, pop)
Queue. Examine the item least recently added.====> FIFO = "first in first out" (enqueue, dequeue)
public class StackOfStrings
StackOfStrings() ===> create an empty stack
void push(String item) ===> insert a new string onto stack
String pop() ===> remove and return the string
most recently added
boolean
isEmpty() ===> is the stack empty?
int size() ===> number of strings on the stack
StackImplement
import java.io.*;
import java.util.*;
class StackImplement
{
// Pushing element on the top of the stack
static void stack_push(Stack<Integer> stack)
{
for(int i = 0; i < 5; i++)
{
stack.push(i);
}
}
// Popping element from the top of the stack
static void stack_pop(Stack<Integer> stack)
{
System.out.println("Pop :");
for(int i = 0; i < 5; i++)
{
Integer y = (Integer) stack.pop();
System.out.println(y);
}
}
// Displaying element on the top of the stack
static void stack_peek(Stack<Integer> stack)
{
Integer element = (Integer) stack.peek();
System.out.println("Element on stack top : " + element);
}
// Searching element in the stack
static void stack_search(Stack<Integer> stack, int element)
{
Integer pos = (Integer) stack.search(element);
if(pos == -1)
System.out.println("Element not found");
else
System.out.println("Element is found at position " + pos);
}
public static void main (String[] args)
{
Stack<Integer> stack = new Stack<Integer>();
stack_push(stack);
stack_pop(stack);
stack_push(stack);
stack_peek(stack);
stack_search(stack, 2);
stack_search(stack, 6);
}
}
This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.
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