Question

我正在尝试使用我的代码来创建创建移动电话对象所需的新构造函数对象。我已经尝试命名constuctor字段来创建对象。

当我在这行this.Mobile samsungPhone = new Mobile("Samsung", 1, 2, "verizon", 3 "GPS");上编译我的代码时，我收到此错误：不是声明，这是什么意思？

更新的代码！

我的代码：

   /**
 * to write a simple java class Mobile that models a mobile phone.
 * 
 * @author (Lewis Burte-Clarke) 
 * @version (14/10/13)
 */
public class Mobile

{
    // type of phone
    private String phonetype;
    // size of screen in inches
    private int screensize;
    // menory card capacity
    private int  memorycardcapacity;
    // name of present service provider
    private String serviceprovider;
    // type of contract with service provider
    private int typeofcontract;
    // camera resolution in megapixels
    private int cameraresolution;
    // the percentage of charge left on the phone
    private int checkcharge;
    // wether the phone has GPS or not
    private String GPS;
    // instance variables - replace the example below with your own
    private int x;

    // The constructor method

    public Mobile(String mobilephonetype, int mobilescreensize,
            int mobilememorycardcapacity,int mobilecameraresolution,String mobileGPS, String newserviceprovider) {
        this.phonetype =  mobilephonetype;
        this.screensize = mobilescreensize;
        this.memorycardcapacity = mobilememorycardcapacity;
        this.cameraresolution = mobilecameraresolution;
        this.GPS = mobileGPS;
        this.serviceprovider = newserviceprovider;
        this.typeofcontract = 12;
        this.checkcharge = checkcharge;
        // you do not use this ones during instantiation,you can remove them if you do not need or assign them some  default values 


        Mobile samsungPhone = new Mobile("Samsung", 1, 2, "verizon", 3, "GPS");
        1024 = screen size;
        2 = memory card capacity;
        3=resolution;
        GPS = gps;
       "verizon"=service provider;
        typeofcontract = 12;
        checkcharge = checkcharge;

    }


    }

    // A method to display the state of the object to the screen
    public void displayMobileDetails() {
        System.out.println("phonetype: " + phonetype);
        System.out.println("screensize: " + screensize);
        System.out.println("memorycardcapacity: " + memorycardcapacity);
        System.out.println("cameraresolution: " + cameraresolution);
        System.out.println("GPS: " + GPS);
         System.out.println("serviceprovider: " + serviceprovider);
        System.out.println("typeofcontract: " + typeofcontract);

    }



}

 class mymobile {
    public static void) {
        Mobile Samsung = new Mobile("Samsung", 1, 2, "verizon", 3, "GPS");
        Mobile Blackberry = new Mobile("Blackberry", "3.", "4","8", "GPS");
        Samsung.displayMobileDetails();
        Blackberry.displayMobileDetails();
    }
}

任何答案和回复都将不胜感激！

Answer 1

this.2 = memory card capacity;
this.3=resolution;

毫无意义。

您无法为文字（2,3）分配值。

编辑：您还需要解决此问题：

Mobile Samsung = new Mobile("Samsung", 1, 2, "verizon", 3, "GPS");

正如其他成员所说。

Answer 2

Mobile Samsung = new Mobile("Samsung", 1, 2, "verizon", 3 "GPS");

参数值3后有一个逗号丢失。我会说这是你的罪魁祸首。

Answer 3

它是一个编译错误，这意味着编译器期待一个声明，你给了别的东西，请refer

应该是

Mobile samsungPhone = new Mobile("Samsung", 1, 2, "verizon", 3, "GPS");

Answer 4

移动是一个班级，＆＃34;这个＆＃34;代表当前的对象。所以，你不能使用＆＃34;这个＆＃34;对于Mobile.You应该：

Mobile samsungPhone = new Mobile("Samsung", 1, 2, "verizon", 3, "GPS");

Answer 5

    Mobile samsungPhone = new Mobile("Samsung", 1, 2, "verizon", 3, "GPS");
    1024 = screen size;
    2 = memory card capacity;
    3=resolution;
    GPS = gps;
   "verizon"=service provider;
    typeofcontract = 12;
    checkcharge = checkcharge;

您需要使用合理的值替换new Mobile ctor调用中的数字，如下面的注释/注释所述，例如，您在决议中放置1的位置（没有任何意义，除非它被编入索引或其他内容），你有2放入存储卡容量，其中有3放入分辨率等等。

然后注释掉垃圾行，或者最好删除它们。

Java错误 - 不是声明，这是什么意思？

5 个答案: