Java 重载方法不更改对象中的值
因此,我在Java 重载方法不更改对象中的值,java,methods,Java,Methods,因此,我在main类中有两个重载方法,我正试图使用它们来设置对象的值。这些方法是从另一个类使用的,但它似乎没有做任何事情。当我使用显示方法时,它会打印出Customer的原始值,而不是该方法设置的新值 public class Customer { int customerID = 0; String name = "Name required"; String address = "Address required"; String phoneNumber =
main
类中有两个重载方法,我正试图使用它们来设置对象的值。这些方法是从另一个类使用的,但它似乎没有做任何事情。当我使用显示方法时,它会打印出Customer
的原始值,而不是该方法设置的新值
public class Customer {
int customerID = 0;
String name = "Name required";
String address = "Address required";
String phoneNumber = "Phone Required";
String eMail = "email optional";
public void setCustomerInfo(int ID, String nm, String addr, String phn) {
int customerID = ID;
String name = nm;
String address = addr;
String phoneNumber = phn;
}
public void setCustomerInfo(int ID, String nm, String addr, String phn, String mail) {
int customerID = ID;
String name = nm;
String address = addr;
String phoneNumber = phn;
String eMail = mail;
}
public void display() {
System.out.println("Customer ID: " + customerID);
System.out.println("Customer Name: " + name);
System.out.println("Customer Address: " + address);
System.out.println("Customer Phone Number: " + phoneNumber);
System.out.println("Customer Email Address: " + eMail);
}
}
-
但程序会打印来自客户实例的初始值:
Name required
Customer ID: 0
Customer Name: Name required
Customer Address: Address required
Customer Phone Number: Phone Required
Customer Email Address: email optional
Customer ID: 0
Customer Name: Name required
Customer Address: Address required
Customer Phone Number: Phone Required
Customer Email Address: email optional
方法将值分配给局部变量,而不是类成员。将其更改为:
public void setCustomerInfo(int ID, String nm, String addr, String phn) {
customerID = ID;
name = nm;
address = addr;
phoneNumber = phn;
}
public void setCustomerInfo(int ID, String nm, String addr, String phn, String mail) {
customerID = ID;
name = nm;
address = addr;
phoneNumber = phn;
eMail = mail;
}
方法将值分配给局部变量,而不是类成员。将其更改为:
public void setCustomerInfo(int ID, String nm, String addr, String phn) {
customerID = ID;
name = nm;
address = addr;
phoneNumber = phn;
}
public void setCustomerInfo(int ID, String nm, String addr, String phn, String mail) {
customerID = ID;
name = nm;
address = addr;
phoneNumber = phn;
eMail = mail;
}