Java training course

	final static int NOT_FOUND = -1;

	String s = "Matching patterns in Strings";

	int j1 = s.indexOf (" "); // Find first space

	if (NOT_FOUND != j1)  // If a space was found
	{
	   int j2 = s.indexOf (" ", j1 + 1); // Find next space
	   // ...
	}

	int jn = s.lastIndexOf (" "); 	// Find last space