Introduction to Java Programming and Data Structures, Comprehensive Version, Student Value Edition (11th Edition)
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Chapter 13.8, Problem 13.8.2CP

Explanation of Solution

Abstract class:

An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.

Legal abstract class:

The conditions for a class to be considered as legal abstract class are mentioned below:

  • If a class includes abstract methods, then the class must be declared as abstract.
  • The abstract method that is declared within the abstract class must be declared without braces and followed by a semicolon.

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

  • One cannot instantiate an interface.
  • Interfaces do not contain any constructors.
  • All methods present in the interface are abstracts.
  • An interface does not contain any instance field.
  • An interface cannot be extended by a class.

Similarities between abstract classes and interfaces:

Some of the similarities between abstract classes and interfaces are mentioned below:

  • One cannot create objects for both abstract classes and interfaces.
  • All the abstract methods must be overridden by the sub class in both interfaces and interfaces.
  • One can create reference variables for both abstract classes and interfaces...

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Need help with python code! How do I simplify my code for a beginner to understand, simple fixed format and centering? Such as:  print(f"As an int variable: {age_int:^7}") print(f"In numeric binary: {age_int:^7b}") My Code:name = input("Enter your name: ")print(f"In text name is: {' '.join(name)}")decimal_values = []binary_values = []for letter in name:   ascii_val = ord(letter)   binary_val = format(ascii_val, '08b')   decimal_values.append(str(ascii_val))   binary_values.append(binary_val)# Loop through each letter:print(f"In ASCII decimal: {' '.join(decimal_values)}")print(f"In ASCII binary: {' '.join(binary_values)}")# Ageage_str = input("Enter your age: ")age_int = int(age_str)print(f"As a string \"{age_str}\": {' '.join(age_str)}")age_decimal_values = []age_binary_values = []for digit in age_str:   ascii_val = ord(digit)   binary_val = format(ascii_val, '07b')   age_decimal_values.append(str(ascii_val))   age_binary_values.append(binary_val)print(f"In ASCII decimal: {'…
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Chapter 13 Solutions

Introduction to Java Programming and Data Structures, Comprehensive Version, Student Value Edition (11th Edition)

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