How to Fix Java Cannot Instantiate the Type Error

Today, we will learn how to fix the error cannot instantiate the type error in Java.

This type of error occurs when you try to make an instance of an abstract class. Let’s learn a bit about abstract classes in Java.

Fix cannot instantiate the type Error in Java

We usually use an abstract class when we need to provide some common functionalities among all its components. You’ll be able to implement your class partially.

You will be able to generate functionalities that all subclasses will be able to override or implement. However, you cannot instantiate the abstract class.

Look at the following code:

abstract class Account { // abstract class Cannot Be initiated...
  private int amount;
  Account() {
    // constructor............
  }
  public void withDraw(int amount) {
    this.amount = this.amount - amount;
  }
}

The above abstract class Account cannot be instantiated. Meaning you cannot write the following code.

Account acc = new Account(); // Abstract Cannot Intialized......

So, what’s the solution? You can create a concrete/child class of this abstract class and make an instance of that.

For instance, there are so many types of accounts. They could be savings, business, debit, and much more.

However, all of them are actual accounts, and that is something that they have in common. That’s why we use abstract methods and classes.

Take a look at the following code.

class BusinessAccount extends Account {
  private int Bonus;
  public void AwardBonus(int amount) {
    this.Bonus = Bonus + amount;
  }
}

BusinessAccount class is a concrete and child class of the abstract Account class. You can make an instance of this class and get your work done.

BusinessAccount bb = new BusinessAccount();
// Bussiness Account Can Be intiated Because there is concreate defination..........

So, the conclusion is that you cannot instantiate the abstract class; instead, you can create its child class and instantiate it for the same functionality.

The following is a complete code that you can run on your computer.

abstract class Account { // abstract class Cannot Be intiated...
  private int amount;
  Account() {
    // constructor............
  }
  public void withDraw(int amount) {
    this.amount = this.amount - amount;
  }
}
class BusinessAccount extends Account {
  private int Bonus;
  public void AwardBonus(int amount) {
    this.Bonus = Bonus + amount;
  }
}
public class Main {
  public static void main(String[] args) {
    // Account acc = new Account(); // Abstract Cannot Intialized......
    BusinessAccount bb = new BusinessAccount();
    // Bussiness Account Can Be intiated Because there is concreate defination..........
  }
}

To learn more about Abstract Class, click here.