关于“无法从静态上下文中引用非静态 变量 this”

01:15:21

摘自zhidao.baidu.com

public class fengzhuang
{

public static void main(String []args)
{

Clerk clerk1=new Clerk("职员一",25,2012.12f);

System.out.println("Name:"+clerk1.name+" 

Age:"+clerk1.age+" Salary:"+clerk1.salary);
//试试能不能直接访问private

System.out.println("Name:"+clerk1.name+" 

Age:"+clerk1.age+" Salary:"+clerk1.getSalary());
//再正儿八经调用public方法访问

}

class Clerk
{
public String name;
public int age;
private float salary;
public Clerk(String name,int age,float sal)
{
this.name=name;
this.age=age;
this.salary=sal;
}
public float getSalary()
{
return this.salary;
}
}
}

程序报错

问题在于你把 class Clerk 放到了 public class fengzhuang 内部

Clerk 成了fengzhuang 的非静态内部类，属于fengzhuang 的一个成员

在静态方法main中不能访问非静态的成员，也就不能直接new Clerk()

只能通过外部类的对象访问。

把Clerk clerk1=new Clerk("职员一",25,2012.12f);改成：

Test.Clerk clerk1=new Test().new Clerk("职员一",25,2012.12f);

或者把class Clerk放到fengzhuang 类外面就好了。