illegal start of expression error!!!!

**aks.1393** · January 13th, 2011, 01:18 PM

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 ??

//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 (" ");
			}
		}
	}
}

**copeg** · January 13th, 2011, 02:12 PM

Check the number of parenthesis: see Common java mistakes

**worldblackstar** · January 13th, 2011, 10:44 PM

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

**aks.1393** · January 14th, 2011, 02:56 AM

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

//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)"

**JavaPF** · January 14th, 2011, 08:47 AM

I believe this issue is caused by problems here:

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

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