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Paul Ngugi

Programming is understanding. ~Kristen Nyaard.

Location Nairobi, Kenya Joined Joined on  github website

Education

BSc in Computer Science

Case Study: Web Crawler

Case Study: Web Crawler

1
Comments
3 min read

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Reading Data from the Web

Reading Data from the Web

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2 min read
Case Study: Replacing Text

Case Study: Replacing Text

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2 min read
File Input and Output

File Input and Output

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5 min read
The File Class

The File Class

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3 min read
Defining Custom Exception Classes

Defining Custom Exception Classes

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2 min read
Chained Exceptions

Chained Exceptions

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1 min read
Rethrowing Exceptions

Rethrowing Exceptions

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1 min read
When to Use Exceptions

When to Use Exceptions

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2 min read
The finally Clause

The finally Clause

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1 min read
More on Exception Handling

More on Exception Handling

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7 min read
Exception Types

Exception Types

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2 min read
Exception-Handling Overview

Exception-Handling Overview

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5 min read
Preventing Extending and Overriding

Preventing Extending and Overriding

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1 min read
The protected Data and Methods

The protected Data and Methods

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2 min read
Case Study: A Custom Stack Class

Case Study: A Custom Stack Class

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2 min read
Useful Methods for Lists

Useful Methods for Lists

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2 min read
The ArrayList Class

The ArrayList Class

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5 min read
The Object’s equals Method

The Object’s equals Method

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2 min read
Casting Objects and the instanceof Operator

Casting Objects and the instanceof Operator

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4 min read
Dynamic Binding

Dynamic Binding

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3 min read
Polymorphism

Polymorphism

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1 min read
The Object Class and Its toString() Method

The Object Class and Its toString() Method

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2 min read
Overriding vs. Overloading

Overriding vs. Overloading

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2 min read
Overriding Methods

Overriding Methods

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2 min read
Using the super Keyword

Using the super Keyword

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3 min read
Inheritance, Superclasses and Subclasses.

Inheritance, Superclasses and Subclasses.

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6 min read
Case Study: Ignoring Nonalphanumeric Characters When Checking Palindromes

Case Study: Ignoring Nonalphanumeric Characters When Checking Palindromes

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2 min read
The StringBuilder and StringBuffer Classes

The StringBuilder and StringBuffer Classes

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4 min read
The String Class

The String Class

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6 min read
The BigInteger and BigDecimal Classes

The BigInteger and BigDecimal Classes

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2 min read
Automatic Conversion between Primitive Types and Wrapper Class Types

Automatic Conversion between Primitive Types and Wrapper Class Types

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1 min read
Processing Primitive Data Type Values as Objects

Processing Primitive Data Type Values as Objects

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4 min read
Case Study on Object-Oriented Thinking

Case Study on Object-Oriented Thinking

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4 min read
Class Relationships

Class Relationships

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4 min read
Thinking in Objects

Thinking in Objects

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3 min read
Class Abstraction and Encapsulation

Class Abstraction and Encapsulation

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5 min read
The this Reference

The this Reference

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2 min read
The Scope of Variables

The Scope of Variables

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2 min read
Immutable Objects and Classes

Immutable Objects and Classes

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2 min read
Array of Objects

Array of Objects

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2 min read
Passing Objects to Methods

Passing Objects to Methods

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2 min read
Data Field Encapsulation

Data Field Encapsulation

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3 min read
Visibility Modifiers

Visibility Modifiers

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2 min read
Static Variables, Constants, and Methods

Static Variables, Constants, and Methods

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5 min read
Using Classes from the Java Library

Using Classes from the Java Library

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3 min read
Accessing Objects via Reference Variables

Accessing Objects via Reference Variables

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5 min read
Constructing Objects Using Constructors

Constructing Objects Using Constructors

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1 min read
Example: Defining Classes and Creating Objects

Example: Defining Classes and Creating Objects

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4 min read
Defining Classes for Objects

Defining Classes for Objects

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2 min read
Multidimensional Arrays

Multidimensional Arrays

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5 min read
Case Study: Two-Dimensional Array

Case Study: Two-Dimensional Array

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7 min read
Passing Two-Dimensional Arrays to Methods

Passing Two-Dimensional Arrays to Methods

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1 min read
Processing Two-Dimensional Arrays

Processing Two-Dimensional Arrays

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2 min read
Multidimensional Arrays

Multidimensional Arrays

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3 min read
Command-Line Arguments

Command-Line Arguments

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3 min read
The Arrays Class

The Arrays Class

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2 min read
Sorting Arrays

Sorting Arrays

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2 min read
Searching Arrays

Searching Arrays

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4 min read
Variable-Length Argument Lists

Variable-Length Argument Lists

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1 min read
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