Java 报错：“缺少标识符”

1. 课后练习：将公有变量改成私有变量之后，增加两个构造函数，访问通过外部调用构造函数实现初始化赋值

2.源码

//程序文件名为 UseConstruct.java
public class UseConstruct
{
    public static void main(String[] args) 
    {
        Manager m = new Manager("王飞",10000,"业务部");  //初始化赋值
        System.out.println(m.getSalary());
    }
}

class Employee
{
    private String name;
    private int salary;

    //构造函数
    public Employee(String_name, int_salary)
    {
        name = _name;
        salary = _salary;
    }

    public String getSalary()
    {
        String str;
        str = "名字:" + name +"\nSalary:" + salary;
        return str;
    }
}

class Manager extends Employee
{
    private String department;

    //构造函数
    public Manager(String_name, int_salary, String_department)
    {
        super(_name, _salary);
        department = _department;
    }

    public String getSalary()
    {
        return super.getSalary() + "\nDepartment:" + department;
    }
}

3. 运行结果

图片.png

4. 原因及解决办法

在两个构造函数处，参数声明格式错误String_name, int_salary, String_department

5. 解决办法

将 String_name, int_salary, String_department
改为 String _name, int _salary, String _department

6. 总结

Java 基础太弱，需要多注意语法规范。