Java commentkiller

Main.java

package net.guipsp.commentkiller;

import java.io.*;

public class Main {

	public static final void main(String[] args) {
		try {
			stripComments(new FileReader("in.java"), new FileWriter("out.java"));
		} catch (Throwable t) {
			throw new RuntimeException(t);
		}
	}


	private static final void stripComments(Reader in, Writer out) throws IOException {
		//by GUIpsp, if you could keep this comment in that's be great, if not that's great too.
		//License: CC0
		boolean inComment = false;
		boolean inString = false;
		char c;
		int ci;
		while ((ci = in.read()) != -1) {
			c = (char) ci;
			switch (c) {
				case '\\': {
					out.write(c);
					out.write(in.read());//Eat for escaped "
					break;
				}
				case '\"': {
					if (!inComment) {
						out.write(c);
						inString = !inString;
					}
					break;
				}
				case '\'': {
					if (!inComment) {
						out.write(c);
						out.write(in.read());
						out.write(in.read());
					}
					break;
				}
				case '*': {
					char c2 = (char) in.read();
					if (inComment && c2 == '/') {
						inComment = false;
						out.write(' ');//Allows int x = 3; int y = -/**/-x; to work
					} else {
						out.write(c);
						out.write(c2);
					}
					break;
				}
				case '/': {
					if (!inString) {
						char c2 = (char) in.read();
						switch (c2) {
							case '/':
								char c3 = 0;
								while (c3 != '\n' && c3 != '\r') {
									c3 = (char) in.read();
								}
								out.write(c3);//write newline
								break;
							case '*':
								inComment = true;
								break;
							default:
								out.write(c);
								out.write(c2);
								break;
						}
					} else {
						out.write(c);
					}
					break;
				}
				default: {
					if (!inComment) {
						out.write(c);
					}
					break;
				}
			}
		}
		out.close();
	}

}