import java.io.FileReader;
import java.io.StreamTokenizer;
import java.io.StringReader;

// Do you see this comment?
public class TokenizerExample2 {
	
	public static void main(String[] args) {
		try {
			FileReader reader = new FileReader("sample.html");
			StreamTokenizer in = new StreamTokenizer(reader);
			int tokenType, depth = 0;
			in.wordChars(0, 127);
			in.ordinaryChar('<');
			in.ordinaryChar('/');
			in.ordinaryChar('>');
			in.ordinaryChar('\r');
			in.ordinaryChar('\n');
			
			while ((tokenType = in.nextToken()) != StreamTokenizer.TT_EOF) {
				if (tokenType == StreamTokenizer.TT_WORD) {
					outputString(depth, in.sval);
				} else if (tokenType == '<') {
					tokenType = in.nextToken();
					if (tokenType == '/') {
						depth--;
						in.nextToken();
						outputString(depth, "</" + in.sval + ">");
					} else {
						String internalStr = in.sval;
						while((tokenType = in.nextToken()) != '>') {
							if (tokenType == StreamTokenizer.TT_WORD) {
								internalStr += in.sval;
							} else {
								internalStr += (char)tokenType;
							}
						}
						outputString(depth, "<" + internalStr + ">");
						if (!internalStr.startsWith("BR")) {
							depth++;
						}
					}
				} else if (tokenType == '/') {
					System.out.print("/");
				}
			}
			reader.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	public static void outputString(int depth, String string) {
		for (int i = 0; i < depth; i++) {
			System.out.print("\t");
		}
		System.out.println(string);
	}
}