Java: Regular expression to match dot separated numbers

The dot separated values look like below:

1

1.2.3

1.2.3.4.5

The regular expression to match: "^\\d+(\\d*.)*\\d+$"

Java code:

System.out.println(Pattern.matches("^\\d+(\\d*.)*\\d+$", "1")); // true
System.out.println(Pattern.matches("^\\d+(\\d*.)*\\d+$", "1.2.3")); // true
System.out.println(Pattern.matches("^\\d+(\\d*.)*\\d+$", "1.2.a")); // false
System.out.println(Pattern.matches("^\\d+(\\d*.)*\\d+$", "1.2.3.")); // false