Question

java自学提问： cannot be resolved to a variable

自学到关于抽象类的内容这，照着视频里的代码敲出了以下这些，除了最后main函数里的那句。本来就是想自己随意检验一下。但是内容里 new Pro(zhang,33,8000).work(); 这句，"zhang"那里总是报错，cannot be resolved to a variable，想询问这是怎么回事？

abstract class Employee
{
private String name;
private String id;
private double pay;

Employee(String name,String id,double pay)
{
this.name=name;
this.id=id;
this.pay=pay;
}
public abstract void work();
}

class Manager extends Employee
{
private int bonus;
Manager(String name,String id,double pay,int bonus)
{
super(name,id,pay);
this.bonus=bonus;
}
public void work()
{
System.out.println("manager work");
}
}

class Pro extends Employee
{

Pro(String name,String id,double pay)
{
super(name,id,pay);
}
public void work()
{
System.out.println("pro work");
}
}

public class AbstractTest
{
public static void main(String[] args)
{
new Pro(zhang,33,8000).work();
}
}

Answer 1

没有加双引号 改为 new Pro("zhang",33,8000).work(); 加了双引号才会被编译器认为是字符串，否则会以为是个变量，你又没有声明这个变量，就报错了