import java.io.IOException;
    public class StringReverserThroughStack {
    	private String input;
    	private String output;
    	public StringReverserThroughStack(String in) {
    		input = in;
    	}
    	public String doRev() {
    		int stackSize = input.length();
    		Stack theStack = new Stack(stackSize);
    		for (int i = 0; i < input.length(); i++) {
    			char ch = input.charAt(i);
    			theStack.push(ch);
    		}
    		output = "";
    		while (!theStack.isEmpty()) {
    			char ch = theStack.pop();
    			output = output + ch;
    		}
    		return output;
    	}
    	public static void main(String[] args) 
    	   throws IOException {
    		String input = "Java Source and Support";
    		String output;
    		StringReverserThroughStack theReverser = 
    		      new StringReverserThroughStack(input);
    		output = theReverser.doRev();
    		System.out.println("Reversed: " + output);
    	}
    	class Stack {
    		private int maxSize;
    		private char[] stackArray;
    		private int top;
    		public Stack(int max) {
    			maxSize = max;
    			stackArray = new char[maxSize];
    			top = -1;
    		}
    		public void push(char j) {
    			stackArray[++top] = j;
    		}
    		public char pop() {
    			return stackArray[top--];
    		}
    		public char peek() {
    			return stackArray[top];
    		}
    		public boolean isEmpty() {
    			return (top == -1);
    		}
    	}
    }