試圖實現一個類

Question

林要去跟與我的車跑的編譯器的幫助，我chaned一些東西，我有1個錯誤

public class AutomobileDescription 
{ 
    /** 
    Constructor to display the make, model and price the new automobile I wish to purchase 
    */ 

    public AutomobileDescription(String carMake, String carModel, carPrice) 
    { 
     make = m; 
     model = mo; 
     price = p; 
    } 
    public String m =("Toyota"); 
    public String mo =("Camry"); 
    public String p =("22055"); 

    public String getAutomobileinfo() 
    { 
    return m + mo + p; 
    Automobile myAutomobile = new Automobile(Toyota, Camry, 22055); 
    System.out.println("The Make, Model and Price of the car is: m + mo + p "); 

    } 
} 

---- jGRASP高管：javac的-g AutomobileDescription.java

AutomobileDescription.java:7：錯誤：預期 公共AutomobileDescription（字符串carMake，字符串carModel，carPrice） ^ 1錯誤

---- jGRASP wedge2：退出代碼FO r進程爲1. ---- jGRASP：操作完成。

Answer 1

您在這裏有許多問題：

public class AutomobileDescription 
{ 
    /** 
    Constructor to display the make, model and price the new automobile I wish to purchase 
    */ 

public AutomobileDescription(String carMake, String carModel, /*no return type*/ carPrice) 
{ 
    make = m; 
    model = mo; 
    price = p; 
} 
public String m =("Toyota"); 
public String mo =("Camry"); 
public String p =("22055"); 

    public String getAutomobileinfo() 
    { 
    return m + mo + p; /*return? then why statements after this?*/ 
    Automobile myAutomobile = new Automobile(Toyota, Camry, 22055); 
    System.out.println("The Make, Model and Price of the car is: m + mo + p "); 

    } 
} 

解決方案：

public class AutomobileDescription{ 
/** 
Constructor to display the make, model and price the new automobile I wish to purchase 
*/ 

public AutomobileDescription(String carMake, String carModel, String carPrice) 
{ 
    m = make; 
    mo = model; 
    p = carPrice; 
} 
private String m; 
private String mo; 
private String p; 

public String getAutomobileinfo() 
{ 
    return m + mo + p; 
} 
public static void main(String[] args){ 
    AutomobileDescription myAutomobile = new AutomobileDescription("Toyota", "Camry", "22055"); 
    System.out.println("The Make, Model and Price of the car is: " + myAutomobile.getAutomobileinfo()); 
} 
} 

Answer 2

這不是一個有效的方法名稱：

public String getMake + getModel + getPrice; 

解決這個問題。如果你仍然有問題，請稍微詳細一點。甚至可能發佈錯誤信息！

Answer 3

public AutomobileDescription(String carMake, String carModel, carPrice) 
                   ^^^^^^^^ 

您省略了參數carPrice的類型。最有可能你想

public AutomobileDescription(String carMake, String carModel, BigDecimal carPrice) 

另一個問題......

public String getAutomobileinfo() 
{ 
    return m + mo + p; 
    Automobile myAutomobile = new Automobile(Toyota, Camry, 22055); 
    System.out.println("The Make, Model and Price of the car is: m + mo + p "); 
} 

的return聲明意味着兩個下面的語句永遠不能達到，這將導致編譯錯誤更正後的第一個問題。