java-programming/javaUpdates/src/array/StackDemo.java at master · 9146887137/java-programming · GitHub

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package array;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

import java.util.List;

import java.util.Stack;

public class StackDemo {

public static void main(String[] args) {

List<Integer> i=Arrays.asList(10,20,45,23,89,67,45,34);

Stack<Integer> stack=new Stack<Integer>();

for(Integer e:i) {

if(!stack.contains(e)) {

stack.push(e);

}

System.out.println(stack);

Collections.sort(stack);

System.out.println(stack);

}

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