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. - 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
____.____ = ____;
}
}