Anyone could explain this java class step by step? thanks in advance!

public class Customer {
	private static int latestUid = 1000;
	private String name;
	private long idNr;
	private int uid;
	/**
	* Create a customer with a name and ID. The user is also given a unique
	* customerNr (uid)
	*
	* @param name
	* The name of the customer (e.g. Jane Smith)
	* @param idNr
	* The id of user (personnr)
	*/
	public Customer(String name, long idNr) {
	this.name = name;
	this.idNr = idNr;
	this.uid = ++latestUid;
	}
	/**
	* @return The customer's name
	*/
	public String getName() {
	return name;
	}
	/**
	* @return The customer's id (personnr)
	*/
	public long getIdNr() {
	return idNr;
	}
	/**
	* @return The customer's unique number
	*/
	public int getCustomerNr() {
	return uid;
	}
	/**
	* Returns a description of user (e.g. customerNr, name & idNr)
	*/
	@Override
	public String toString() {
	return " (" + getName() + ", id " + getIdNr() + ", kundnr: " + getCustomerNr() + ")";
	}
	}