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StringR.java

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import java.util.Scanner;

Input: This is my country

Output: sihT is ym country

public class StringR {

public static String[] split(String s) {

int c = 0;

for (int i = 0; i < s.length(); i++) {

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

c += 1;

}

String[] st = new String[c + 1];

String t = "";

int j = 0;

for (int i = 0; i < s.length(); i++) {

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

t += s.charAt(i);

} else {

st[j++] = t;

t = "";

}

st[j] = t;

return st;

}

public static String reverse(String str) {

StringBuilder rev = new StringBuilder("");

if(str==null)return null;

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

rev.append(str.charAt(i));

}

return rev.toString();

}

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("Enter the String: ");

String s = sc.nextLine();

sc.close();

String temp="";

String[] words=split(s);

for(int i=0;i<words.length;i++) {

if(i%2 == 0)

temp+=reverse(words[i])+" ";

else

temp+=words[i]+" ";

}

System.out.println(temp);

}