java 如何用正则判断整数

 public static void main(String[] args) {
        String pattern="-?[1-9]\d*|0";
        Pattern compile = compile(pattern);
        Matcher matcher = compile.matcher("-1");
        if (matcher.matches()) {
            System.out.println("true");
        }else{
            System.out.println("false");
        }

 }