最重要的是能减少代码量。如: public class Id { private String Name; private int Age; private int BornYear;
public Id() { } public Id(String name,int age,int bornyear) { Name=name; Age=age; BornYear=bornyear; }
public static void main(String[] args) { Id hong=new Id("hong",25,1985); Id jian=new Id("jian",23,1989); Id lian=new Id("lian",21,1991); hong.show(); jian.show(); lian.show(); }