package tryingsomething;

import java.util.Stack;

/**

* Created by rmukherj on 7/26/16.

*/

public class StackPrac {

public static String sbu = "Harry has a heart";

public static Stack<String> sb = new Stack<>();

public static void reverse(String s1){

int i=0;

String[] arr = sbu.split(" ");

for (String a: arr

) {

sb.push(a);

sb.push(" ");

}

while(!sb.isEmpty()){

s1 += sb.pop();

}

System.out.println(s1);

}

public static void wordRotate(String word, Integer length){

if(length>0) {

//for(int i =word.length();i>0;i--) {

Character first = word.charAt(0);

String s = word.substring(1);

//String rem = s + first;

String rem = s + first;

System.out.println(rem);

wordRotate(rem, length - 1);

}

}

public static String wordReverse(String word){

if(null == word || word.length()<=1){

return word;

}

return wordReverse(word.substring(1))+word.charAt(0);

}

public static String reverseWords(String s) {

StringBuilder reversed = new StringBuilder();

int j = s.length();

for (int i = s.length() - 1; i >= 0; i--) {

if (s.charAt(i) == ' ') {

j = i;

} else if (i == 0 || s.charAt(i - 1) == ' ') {

if (reversed.length() != 0) {

reversed.append(' ');

}

reversed.append(s.substring(i, j));

}

}

return reversed.toString();

}

public static void main(String[] args){

StackPrac spi= new StackPrac();

spi.reverse("");

String w = "ranjan";

String g = "ranjan is the person";

wordRotate(w, w.length());

String str = wordReverse(w);

System.out.println("The reverse string passed is "+str);

String st = reverseWords(g);

System.out.println(st);

}

}