Defining a POJO
Building a POJO is about creating a straightforward Java class following a few rules. POJO classes are simple and independent; they don't extend other classes or implement interfaces. The main task is to define the fields and create getter and setter methods to access them. Here, you create a POJO for transporting savings account data in a Java application.
This exercise is part of the course
Data Types and Exceptions in Java
Exercise instructions
- Add a field
balanceof typedoubleto hold the account balance value, making sure to choose the correct access. - Define a getter method to return the
balancefield value. - Define a setter method to allow the
balancefield to a new value. - In the setter method, set the
balancefield to the setter's argument.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
public class Test {
public static void main (String[] args){
SavingsAccount account = new SavingsAccount();
account.setAccountNo("12345");
account.setBalance(50000.00);
System.out.println("Account " + account.getAccountNo() + " has balance of: " + account.getBalance());
}
}
public class SavingsAccount {
private String accountNo;
// Add a balance field
____ ____ ____;
public String getAccountNo() {
return accountNo;
}
public void setAccountNo(String accountNo) {
this.accountNo = accountNo;
}
// Define a balance getter method
____ ____ ____() {
return balance;
}
// Define a balance setter method
public ____ setBalance(double balance) {
// Set the balance field
____.____ = ____;
}
}