Incompatible return type error java

Question

class BankAccount {
    private String firstname;
    private String lastname;
    private int ssn;
    private int accountnumber = 0;
    private double accountbala         


        

Answer 1

Forst Error is that the return type of your meyhod is void and the method returns an int.

 public void setAccountNumber(int accountnumber) {
    return accountnumber;
 }

Change it to :

 public int setAccountNumber(int accountnumber) {
    return accountnumber;
 }

and the second thing is this is not a good name for a method which is used for getting the variable , change the name of method to :

 public int getAccountNumber(int accountnumber) { // why is this argument???
    return accountnumber;
 }

One more thing, your method

public void deposit(double amount) {
     return this.accountbalance = this.accountbalance + amount;
}

has the same error. It should be :

public double deposit(double amount) { //change void to double
    return this.accountbalance + amount; //as suggested by SURESH ATTA
}