java program

java program

sir,i'm asked to write a program in java on below question.
Design a java interface for ADT stack.Develop two different class that implements this interface,one using array and other using linked list provide necessary exception handling in both the implementation.

View Answers

August 5, 2010 at 10:54 AM

Hi Friend,

Try the following code:

import java.lang.*;
import java.io.*;
import java.util.*;

interface MyInterface {
int n = 20;

public void pop();

public void push();

public void peek();

public void display();
}

class StackImplementation implements MyInterface {
int arr[] = new int[n];
int top = -1;

public void push() {
try {
DataInputStream dis = new DataInputStream(System.in);
System.out.println("Enter Element");
int ele = Integer.parseInt(dis.readLine());
arr[++top] = ele;
} catch (Exception e) {
System.out.println("e");
}
}

public void pop() {
int popper = arr[top];
top--;
System.out.println("popped element " + popper);
}

public void peek() {
int popper = arr[top];
System.out.println("popped element " + popper);
}

public void display() {
if (top < 0) {
System.out.println("Stack is empty");
return;
} else {
String str = " ";
for (int i = 0; i <= top; i++)
str = str + " " + arr[i];
System.out.println("Elements are " + str);
}
}
}

class StackADT {
public static void main(String arg[]) throws IOException {
DataInputStream dis = new DataInputStream(System.in);
StackImplementation stk = new StackImplementation();
int menu = 0;
do {
System.out.println("1.push \n2.pop \n3.peek \n4.display \n5.Exit");
System.out.println();
System.out.print("Enter your choice: ");
menu = Integer.parseInt(dis.readLine());
switch (menu) {
case 1:
stk.push();
break;
case 2:
stk.pop();
break;
case 3:
stk.peek();
break;
case 4:
stk.display();
break;
case 5:
System.exit(0);
}
} while (menu <= 5);
System.out.println();
}
}

Thanks









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