I am trying to compare the string fields of an object that are stored in an ArrayList against input strings.
In this case, I have an arraylist - ArrayList<Customer> and I have created several Customer-based objects that only has the name and email fields. I am trying to check for duplicates by checking the inputs against the name and email fields as follows:
import java.util.ArrayList;
class Customer
{
private String cName;
private String cEmail;
public Customer(String custName, String custEmail)
{
this.cName = custName;
this.cEmail = custEmail;
}
public String getName()
{
return cName;
}
public String getEmail()
{
return cEmail;
}
}
class Main {
public static void main(String args[])
{
ArrayList<Customer> custArr = new ArrayList();
Customer aaa = new Customer ("John Perkins", "john.perkins@mail.com");
Customer bbb = new Customer ("Peh Yan", "peh.yan@mail.com");
Customer ccc = new Customer ("In Koh", "inkoh@mail.com");
custArr.add(aaa);
custArr.add(bbb);
custArr.add(ccc);
System.out.println("Added in test customers info.");
// Assume these are the inputted values
String name = "in koh";
String email = "inKoh@mail.com";
for(int i=0; i<custArr.size(); i++)
{
// if (custArr.get(i).getName().toLowerCase() == email.toLowerCase() &&
// custArr.get(i).getEmail().toLowerCase() == email.toLowerCase())
if (custArr.get(i).getEmail().toLowerCase() == email.toLowerCase())
{
System.out.println("Error! User already exists in the system");
}
}
}
}
However, the string comparison does not seems to be working unless my input string fields are worded exactly the same as the test data. For example, String name = "in koh" does not works, but if I wrote it as String name = "In Koh", it will works.
Need some insights on this as I am pretty sure both getName and getEmail are indeed returning String value
