illegal start of expression error!!!!

Hey...this is my code to reverse each word of the string input!!
At line 12 it says 'illegal start of expression'....any idea how to troubleshoot this ??

Code Java:

---

//Reverse each word of the sentence
import java.io.*;
class rev_word
{
	public static void main (String args[ ])throws IOException
	{
		BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
		String S = br.readLine();
		S=S+"";int k=0; String word="";
		for (int i=0; i<S.length();i++)
		{
			if (S.charAt(i) == ' ')) // <-- error shown at this line 'illegal start of expression'
			{
				word=S.substring (k, i);
				k= i+1;
				for (int j=word.length();j>=0;j++)
				System.out.print (word.charAt(j));
				System.out.print (" ");
			}
		}
	}
}

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Check the number of parenthesis: see Common java mistakes

Extra bracket in if condition. It should be:
if(S.charAt(i)==' ')

ok i removed the extra paranthesis
and now the code luks somewhat like

Code Java:

---

//Reverse each word of the sentence
import java.io.*;
class rev_word
{
    public static void main (String args[ ])throws IOException
    {
        BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        System.out.println("Enter a String");
        String S = br.readLine();
        S=S+"";int k=0; String word="";
        for (int i=0; i<S.length();i++)
        {
            if (S.charAt(i) == ' ')
            {
                word=S.substring (k, i);
                k= i+1;
                for (int j=word.length();j>=0;j++)
                System.out.print (word.charAt(j));
                System.out.print (" ");
            }
        }
    }
}

---

it has compiled but now its giving a runtime error as follows:
"Enter a String
I love playing guitar
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 1
at java.lang.String.charAt(String.java:686)
at rev_word.main(abc.java:18)"

I believe this issue is caused by problems here:

Code Java:

---

                for (int j = word.length(); j >= 0; j++)
                System.out.print(word.charAt(j));

---