Reverse a string using stack

 import java.util.Stack;


public class ReverseStack {

    public static void main(String[] args) {
        String str="reverse";
        String rev="";
        Stack<Character> stack=new Stack<>();
        for (int i=0;i<str.length();i++)
            stack.push(str.charAt(i));

        while (!stack.isEmpty())
            rev=rev+stack.pop();

        System.out.println(rev);
    }
}

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