Java 需求标识符是什么意思?
我正在尝试制作一个程序,跟踪热狗摊和热狗销售量,同时我有两个文件,这是第一个文件,它指向括号,我不确定它的意思是什么,需要一个标识符。这是密码Java 需求标识符是什么意思?,java,identifier,Java,Identifier,我正在尝试制作一个程序,跟踪热狗摊和热狗销售量,同时我有两个文件,这是第一个文件,它指向括号,我不确定它的意思是什么,需要一个标识符。这是密码 public class HotDogStand { private String nameHotDogStand; private String IDnumber; private int hotDogsSold; public HotDogStand(String nameHotDogStand, String ID
public class HotDogStand
{
private String nameHotDogStand;
private String IDnumber;
private int hotDogsSold;
public HotDogStand(String nameHotDogStand, String IDnumber, int hotDogsSold)
{
this.nameHotDogStand = nameHotDogStand;
this.IDnumber = IDnumber;
this.hotDogsSold = hotDogsSold;
}
public String getNameHotDogStand()
{
return nameHotDogStand;
}
public void setNameHotDogStand(String nameHotDogStand)
{
this.nameHotDogStand = nameHotDogStand;
}
public String getIDnumber()
{
return IDnumber;
}
public void setIDnumber(String IDnumber)
{
this.IDnumber = IDnumber;
}
public int getHotDogsSold()
{
return hotDogsSold;
}
public void setHotDogsSold(int HotDogsSold)
{
this.hotDogsSold = hotDogsSold;
}
public void SetJustSold(int hotDogsSold)
{
hotDogsSold++;
totalHotDogsSold++;
}
public void showHotDogsSold(int hotDogsSold)
{
System.out.print("The number of hot dogs sold is: " + hotDogsSold);
}
private static int totalHotDogsSold;
public String showTotalHotDogsSold()
{
return ("The total number of hot dogs sold is: " + totalHotDogsSold);
}
public String toString()
{
return "The total number of hot dogs sold is: " + totalHotDogsSold;
}
public HotDogStand(HotDogStand otherHotDogStand)
{
nameHotDogStand = otherHotDogStand.nameHotDogStand;
hotDogsSold = otherHotDogStand.hotDogsSold;
IDnumber = otherHotDogStand.IDnumber;
}
public String toString()
{
return("Total sold =" + (one.getNumSold() + two.getNumSold() +
three.getNumSold()) + "\n");
}
one.SetJustSold();
two.SetJustSold();
three.SetJustSold();
}
还有第二个问题,我对第二个文件不太清楚。我是否需要把“返回”放在公众的下面,但放在HotDogStand的上面,或者是其他问题
public class TheHotDogStands
{
public static void main(String[]args)
{
HotDogStand one = new HotDogStand ("Bob's hotdog stand" , "0081" , "5");
HotDogStand two = new HotDogStand ("Chris's hotdog stand" , "4591" , "3");
HotDogStand three = new HotDogStand ("Matt's hotdog stand" , "1171" , "10");
System.out.println(one.getName + one.getID + one.getNumSold);
System.out.println(two.getName + two.getID + two.getNumSold);
System.out.println(three.getName + three.getID + three.getNumSold);
System.out.println("Total sold for all stands = " + (one.getNumSold() +
two.getNumSold() + three.getNumSold()));
}
public one(one aOne)
{
nameHotDogStand = aNameHotDogStand;
IDnumber = aIDnumber;
hotDogsSold = aHotDogsSold;
}
}
我对编程还是新手,遗憾的是我们的书不太擅长解释,我的导师说这本书之所以被选中,是因为它适用于他们教授的两门课,那么有没有好的网站和指南可以提供一些好的例子?我有时确实会发现一些,但它们似乎是从不同的来源和网站传播开来的
感谢您提供的任何信息。在第一个示例中,您可以在任何方法之外获得以下行:
one.SetJustSold();
two.SetJustSold();
three.SetJustSold();
它们需要位于方法或静态初始值设定项块中
在第二个示例中,您从未为
one()
声明过返回类型,忽略了这一点,在第二个示例中,HotDogStands
对象从未被实例化,因此该方法无论如何都是无用的。查看这些代码,我认为您根本不了解发生了什么。你可能想退一步,从“hello world”开始,然后从那里开始。从O'Reily&Associates那里学习Java或从Oracle自己那里学习在线系列是一本很好的书: