Question

enter image description here 我有三个课程c6，c7和c8，如下所示：

public class c6{
private String name;
private int age;
public c6() {
    //default constructor
}
public c6(String name,int age){
    this.name = name;
    this.age = age;
}
public void show(){
    System.out.println("Name :"+name);
    System.out.println("Age :"+age);
}}

这是我的班级c7

public class c7 extends c6{
private double salary;
public c7() {
    //default constructor
}
public c7(String name,int age,double salary) {
    super(name,age);
    this.salary = salary;
}
public void show(){
    super.show();
    System.out.println("Salary :"+salary);
}}

这是我的班级c8：

public class c8 {
public static void main(String[] args) {

    c7 ob1 = new c7("akhil",12,9000.00);
    c7 ob2 = new c7("akhil",12);

    ob1.show();
    ob2.show();
}}

我试图将c6的内容继承到c7中我得到的错误是

c8.java:4: error: constructor c7 in class c7 cannot be applied to given types;
            c7 ob1 = new c7("akhil",12,9000.00);
                     ^
 required: no arguments
found: String,int,double

原因：实际和正式的参数列表长度不同

我为c8.java:5

收到同样的错误

类c7中的构造函数c7不能应用于给定类型

0 个答案: