求写一个java 正则表达式

Question

求写一个正则表达式，任意位数的数字-任意位数的数字。只能是数字，可以0开头。比如:
0123-01234560

Answer 1

public static void main(String[] args) {
    String str = "0123-01234560";
    String regEx = "[0-9]*-[0-9]*";
    Pattern pattern = Pattern.compile(regEx);
    Matcher matcher = pattern.matcher(str);
    boolean rs = matcher.matches();
    System.out.println(rs);
}