Question

Write a Java program to implement the Stack using arrays. Write Push(), Pop(), and Display() methods to demonstrate its working.

Answer 1

For Theory of Array Implementation of Stack Click here

Java Program

import  java.io.*; class StackArray {     static int max=10,i,top,ch,item;     static int a[]=new int[10];     StackArray()     {         top=-1;     }     public static void main(String args[])throws IOException     {         while((boolean)true)         {             System.out.print("\n1.Push\n2.Pop\n3.Display\n4.Exit\nEnter your choice:");             try             {                 BufferedReader br=new BufferedReader(new InputStreamReader(System.in));                 ch=Integer.parseInt(br.readLine());             }             catch(Exception e) { }             if(ch==4)                 break;             else             {                 switch(ch)                 {                 case 1:                     push();                     break;                 case 2:                     pop();                     break;                 case 3:                     display();                     break;                 }             }         }     }     static void push()     {         if(top==max)             System.out.println("Stack is full!");         else             try             {                 BufferedReader br=new BufferedReader(new InputStreamReader(System.in));                 System.out.print("Enter the element: ");                 item=Integer.parseInt(br.readLine());                 a[++top]=item;             }             catch(Exception e) { }     }     static void pop()     {         if(top==-1)             System.out.println("Stack is empty!");         else             top--;         System.out.print("Popped item: "+a[top]);     }     static void display()     {         System.out.print("Elements in stack are: ");         for(i=top; i>0; i--)             System.out.print(a[i]+" ");     } }

Output

1.Push 2.Pop 3.Display 4.Exit Enter your choice:1 Enter the element: 10 1.Push 2.Pop 3.Display 4.Exit Enter your choice:1 Enter the element: 20 1.Push 2.Pop 3.Display 4.Exit Enter your choice:1 Enter the element: 30 1.Push 2.Pop 3.Display 4.Exit Enter your choice:3 Elements in stack are: 30 20 10 1.Push 2.Pop 3.Display 4.Exit Enter your choice:2 Popped item: 20 1.Push 2.Pop 3.Display 4.Exit Enter your choice:4

---

For more VTU IV Sem DAA Lab Experiments Click here

---