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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
问候:我尝试在我的GUI类中使用我在另一个类中声明的方法时遇到问题。
这是我正在尝试使用的Memba类中的方法:
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;
}
该方法创建一个新成员。
在我的GUI类>>注册类<<我正在尝试使用该方法,我无法让它工作。我尝试创建实例,如下所示:
Memba mmb = new Memba();
Memba mem= new newMember();
Memba mm = new Memba(s1,s2,s3,s4,s5,s6,s7);
代码已经获取在文本字段中输入的数据。
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();
请帮我解决这个问题。请注意。
您需要使用构造函数,或者返回Memba
实例的方法,而不是void
。
构造函数
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;
}
提供新实例的方法 (通常以工厂模式等)
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;
}
笔记
Memb_Name
应该重构为name
或memberName
等。 void
方法的最后一个赋值中,您似乎使用方法的参数指定static
字段。 我在这里假设它们实际上是Memba
实例字段 有两个选项,使用非静态void方法,您需要一个实例来调用newMember
。 喜欢,
Memba mmb = new Memba();
mmb.newMember(s1,s2,s3,s4,s5,s6,s7);
另外,改变newMember
返回一个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样
Memba mmb = Memba.newMember(s1,s2,s3,s4,s5,s6,s7);
我通过创建一个能够在我的GUI中重用的构造函数来解决上面的问题。
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;
}
我用它作为
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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