[JAVA]preventing specific duplicate elements from being added to a custom object arraylist - class

Question

so lets say i have an class called customer with first and last name and username and password
i have another class called bankaccounts with account number and banlance;
and i have an arraylist of customers;
and i have a txt file that i need to read
and it contains the same customer sometimes
how do i make it so that the when its reading if the (first name,lastname,username)are the same
the program wii not add the customer to the list but instead will only add the account to the
existing customer in the list.
sorry if my whole code is a mess but Im so lost in every where and I just want to get this part(the title) right at least please let me know if my question is inappropriate any where i will try my best to edit it
Bob, Mike, bobbmike, Ball!36Hi, 109001, Saving, 140.23, 0.05//good
Bob, Mike, bobbmike, Ball!36Hi, 109002, BasicChecking, 555.23//good
Mouse, Mickey, mickeymouse, MickCool890, ten, Saving, 89, 0.03//wrong numbber
Matt, Benjamin, jamimatt, Kit.24TT, 109201, InterestBearingChecking, 9000.00, 0.06//good
Keller, Helen, kel23hel, Poppins?89, 192911, Retirement, 11198.10//good
Mouse, Minnie, minniemouse, MinnCool19, 192922, Checking, 9000, 0.04//wrong type with interest
Keller, Helen, kel23hel, Poppins?89, 192912, InterestBearingChecking, 11198.10, 0.03//good
Tim, Mary, coolcats, Purr45??, 199122, BasicChecking, 201013.10//good
TheBuilder, Bob, bobbyNice18, 122101, Saving, 0.02//missing password, missing interest
class Customer{
protected String firstName;
protected String lastName;
protected String username;
protected String password;
protected ArrayList<BasicAccount> accounts;
public void setLastName(String ln){this.lastName=ln;}
public String getLastName(){return lastName;}
public void setFirstName(String fn){this.firstName=fn;}
public String getFirstName(){return firstName;}
public void setUsername(String un){this.username=un;}
public String getUserName(){return username;}
public void setPassword(String pw){this.password=pw;}
public String getPassword(){return password;}
public Customer(){}
public Customer(String f,String l,String u,String p) throws Exception{
this.username=f;
this.lastName=l;
this.username=u;
this.password=p;
}
public void addAccount(BasicAccount a){
this.accounts.add(a);
}
public void addAccount(String aType,float balance){
BasicAccount a=new BasicAccount(aType,balance);
}
}
class BasicAccount {
protected static int nextAvailableAccountNumber;
protected AccountType aType;
protected float balance;
protected int accountNum;
enum AccountType {BasicChecking, InterestBearingChecking, Saving, Retirement}
public BasicAccount(){};
public BasicAccount(String f,String l,String u,String p,int an,String type,float b){
}
public BasicAccount(Customer c,int a,String type,float b){
}
public BasicAccount(int a,String type,float b){
this.accountNum=a;
this.aType=AccountType.valueOf(type);
this.balance=b;
nextAvailableAccountNumber=accountNum+1;
}
public BasicAccount(String f,String l, String u,String p,String type,float b){
}
public BasicAccount(Customer c,String type,float b){
}
public BasicAccount(String type,float b){
this.accountNum=nextAvailableAccountNumber;
this.aType=AccountType.valueOf(type);
this.balance=b;
}
public static void main(String[] args)throws IOException {
ArrayList<Customer>cc=new ArrayList<Customer>();
Scanner k=new Scanner(System.in);
out.println("please enter the filename");
String filename=k.nextLine();
File inFile=new File(filename);
Scanner sc=new Scanner(inFile);
String error="";
ArrayList<String> errorLines=new ArrayList<String>();
while(sc.hasNext()){
String line=sc.nextLine();
try{
String []info=line.split(",");
if(info.length==7){
if(info[5].equals("BasicChecking")||info[5].equals("Retirement")){
Customer c=new Customer(info[0],info[1],info[2],info[3]);
BasicAccount act=new BasicAccount(c,Integer.parseInt(info[4]),info[5],Float.parseFloat(info[6]));
String [] user={c.firstName,c.lastName,c.username,c.password};
**for(Customer x:cc){
if(x.contains(c.getFirstName())&&c.getLastName()%%c.getUserName){
x.addAccount(act);
}
else{
c.addAccount(act);
cc.add(c);
}
}**//so if the customer object in the array list contains the same information from the
new Customer c it will only add the account to the x but if its not i will add to c and add
c to the arraylist but this doesn't work
}
else{
//error+="\n Wrong.";
//out.println(error);
}
}
}
catch(Exception e){
error+="\n wrong";
errorLines.add(line);
out.println("wrong data");
}
}
out.println(error);
if(errorLines.size()==0){}
else{
out.println(errorLines);
}
out.println(errorLines);
}
}
Main.java:277: error: cannot find symbol
if(x.contains(c.getFirstName())&&c.getLastName()){
^
symbol: method contains(String)
location: variable x of type Customer
Note: Main.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
1 error
sorry if my whole code is a mess but Im so lost in every where and I just want to get this part(the title) right at least please let me know if my question is inappropriate any where i will try my best to edit it