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來自 Duke University 的課程

Java Programming: Arrays, Lists, and Structured Data

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Duke University

Java Programming: Arrays, Lists, and Structured Data

1197 個評分

課程 2（共 4 門，Specialization Object Oriented Programming in Java）

This course will build on the skills you learn in Java Programming: Solving Problems with Software. You will continue to expand your programming skill set to read and manipulate data with more complex structure. You will also write programs with more complex structure. By the end of this course, you will be able to: 1. Read and write data from/to files; 2. Solve problems involving data files; 3. Perform quantitative analyses of data (e.g., finding maximums, minimums, averages); 4. Store and manipulate data in an array or ArrayList; 5. Combine multiple classes to solve larger problems; 6. Use iterables and collections (including maps) in Java.

從本節課中

GladLibs: Stories from Templates

After completing this module, you will be able (1) to program a word frequency counter to analyze any input text file, (2) to select and substitute words from a list into a document template using both ArrayList and HashMap, (3) to create new lists to use in templates, (4) to recognize brittle code, and (5) to improve code with flexible, object-oriented design. You will gain these skills in the framework of developing a randomly generated story that we call GladLibs. You may discover that bald lions change peoples’ lives, or that fluffy dinosaurs get things done in a jiffy. We hope you have fun developing your Java skills this week!

Introduction2:27

High-level Design Concepts5:31

ArrayList for Unique Words7:02

ArrayList Advantages and Issues7:56

與講師見面

Andrew D. Hilton
Associate Professor of the Practice
Electrical and Computer Engineering
Robert Duvall
Lecturer
Computer Science
Owen Astrachan
Professor of the Practice
Computer Science
Susan H. Rodger
Professor of the Practice
Computer Science

Hello.

Welcome to this module, in which we'll use the idea of creating random,

hopefully entertaining stories to motivate and explore important Java concepts.

Here's an example of a randomly generated story.

We use a couple of these stories to introduce our Java concept.

Let's look at this first story.

My name is Albert, and I live in France.

One day I'd like to travel to Mexico, because I've never seen a tiger and

I read that they have gigantic slippery ones there.

However, because 55 orange gigantic wheelbarrows make it difficult to travel,

I may have to travel to Ecuador instead.

That would be okay, but it might take 305 minutes to get there.

We'll look at another story with the same pattern.

Perhaps you can see some of the similarities to the previous story.

My name is Vivian, and I live in India.

One day I'd like to travel to the United States, because I've

never seen a pangolin, and I read that they have furious and funny ones there.

However, because 95 purple, slippery houses make it difficult to travel,

I may have to travel to China instead.

That would be okay, but might take 445 hours to get there.

There are many similarities in these stories,

which isn't surprising since they were generated by a common template.

You'll be exploring and modifying the Java program that reads the story template,

finds replacement words where those are needed, and generates a story.

The similarities in these stories are captured in parts of this template, that

are replaced with words chosen randomly, from lists of words of different types.

For example, you're program might choose a name like Albert or Vivian.

And choose a country like India, France, China, the United States and more.

Animals chosen could include tigers, pangolins, and

whatever dragons you might imagine, for example.

Your program can choose nouns.

And as you'll see, the choices can make for interesting stories.

You'll be able to share words that are chosen at random with other learners,

as you explore these new Java concepts.

Let's get started.

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