java核心技術 程序清單4-5 ConstructorTest

import java.util.Random; public class Employee { private static int nextId; private int id; private String name=""; private double salary; /* 靜態代碼塊和普通代碼塊的區別，靜態代碼塊在類最開始被執行，能夠理解爲在內

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