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[英]How do I implement a class that loads a file into my program that other classes can use?
[英]How can I use a method in one of my other classes in my current class
問候:我嘗試在我的GUI類中使用我在另一個類中聲明的方法時遇到問題。
這是我正在嘗試使用的Memba類中的方法:
public void newMember(String Memb_Name,String Memb_Surname,int age,int contact,String address,String username,String password){
this.Memb_Name = Memb_Name;
this.Memb_Surname = Memb_Surname;
this.age = age;
this.contact = contact;
this.address = address;
Memba.username = username;
Memba.password = password;
}
該方法創建一個新成員。
在我的GUI類>>注冊類<<我正在嘗試使用該方法,我無法讓它工作。我嘗試創建實例,如下所示:
Memba mmb = new Memba();
Memba mem= new newMember();
Memba mm = new Memba(s1,s2,s3,s4,s5,s6,s7);
代碼已經獲取在文本字段中輸入的數據。
String s1 = nameFld.getText();
String s2 = surnameFld.getText();
int s3 = Integer.parseInt(ageFld.getText());
int s4 = Integer.parseInt(contactFld.getText());
String s5 = addressFld.getText();
String s6 = usernameFld.getText();
String s7 = passwordFld.getText();
請幫我解決這個問題。請注意。
您需要使用構造函數,或者返回Memba
實例的方法,而不是void
。
構造函數
public Memba(String Memb_Name,String Memb_Surname,int age,int contact,String address,String username,String password) {
this.Memb_Name = Memb_Name;
this.Memb_Surname = Memb_Surname;
this.age = age;
this.contact = contact;
this.address = address;
this.username = username;
this.password = password;
}
提供新實例的方法 (通常以工廠模式等)
public static Memba newInstance(String Memb_Name,String Memb_Surname,int age,int contact,String address,String username,String password) {
// you will need to declare an empty constructor in your Memba class,
// _if_ you have already declared the constructor above,
// for the following line to compile
Memba result = new Memba();
result.Memb_Name = Memb_Name;
result.Memb_Surname = Memb_Surname;
result.age = age;
result.contact = contact;
result.address = address;
result.username = username;
result.password = password;
return result;
}
筆記
Memb_Name
應該重構為name
或memberName
等。 void
方法的最后一個賦值中,您似乎使用方法的參數指定static
字段。 我在這里假設它們實際上是Memba
實例字段 有兩個選項,使用非靜態void方法,您需要一個實例來調用newMember
。 喜歡,
Memba mmb = new Memba();
mmb.newMember(s1,s2,s3,s4,s5,s6,s7);
另外,改變newMember
返回一個Memba
(和是static
),像
public static Memba newMember(String Memb_Name,String Memb_Surname,
int age,int contact,String address,String username,String password){
Memba m = new Memba();
m.Memb_Name = Memb_Name;
m.Memb_Surname = Memb_Surname;
m.age = age;
m.contact = contact;
m.address = address;
m.username = username;
m.password = password;
return m;
}
然后你可以像使用它一樣
Memba mmb = Memba.newMember(s1,s2,s3,s4,s5,s6,s7);
我通過創建一個能夠在我的GUI中重用的構造函數來解決上面的問題。
public Memba(String MembsName,String MembsSurname,int ages,int contacts,String addresses,String usernames,String passwords){
this.MembName = MembsName;
this.MembSurname = MembsSurname;
this.age = ages;
this.contact = contacts;
this.address = addresses;
Memba.username = usernames;
Memba.password = passwords;
}
我用它作為
String s1 = nameFld.getText();
String s2 = surnameFld.getText();
int s3 = Integer.parseInt(ageFld.getText());
int s4 = Integer.parseInt(contactFld.getText());
String s5 = addressFld.getText();
String s6 = usernameFld.getText();
String s7 = passwordFld.getText();
new Memba(s1,s2,s3,s4,s5,s6,s7);
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