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Fools ignore complexity; pragmatists suffer it; experts avoid it;
geniuses remove it.

Alan Perlis

%

People think that computer science is the art of geniuses but the
actual reality is the opposite, just many people doing things 

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Summary of Effective Java, Third Edition (2018)

By Section / Content Header

Front Matter

Contents

Foreword

Preface

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Summary of Clean Code

By Section Headers

The following are the chapter and section headers of the book Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin, et. al..

Chapter 1: Clean Code

by Robert C. Martin

There will be code

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   Optional<String> pathsStr = get(PATHS_KEY);
   if (pathsStr.isPresent()) {
     ObjectMapper objectMapper = new ObjectMapper();
     try {
       String[] paths = objectMapper.readValue(pathsStr.get(), String[].class);
       // ... the rest elided

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String zipCode = NullSafe.of(user)
                   .call(User::addresses)
                   .call(UserAddresses::billingAddress)
                   .call(Address::zipCode)
                   .get();

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// standard java
String zipCode = null;
if(user != null) {
    UserAddresses userAddresses = user.addresses();
    if(userAddresses != null) {
        Address billingAddress = userAddresses.billingAddress();
        if (billingAddress != null) {
            zipCode = billingAddress.zipCode();
        }
    }

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int? length = customers?.Length; // null if customers is null   
Customer first = customers?[0];  // null if customers is null  
int? count = customers?[0]?.Orders?.Count();  // null if customers, the first customer, or Orders is null

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final Optional handle = (Optional)JAVA_9_PROCESSHANDLE_OF.invoke(null, pid);
if (handle.isPresent()) {
  JAVA_9_PROCESSHANDLE_DESTROY.invoke(handle.get());
}

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public void writeList() {
    PrintWriter out = null;

    try {
        System.out.println("Entering" + " try statement");

        out = new PrintWriter(new FileWriter("OutFile.txt"));
        for (int i = 0; i < SIZE; i++) {
            out.println("Value at: " + i + " = " + list.get(i));
        }

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import java.util.PriorityQueue;

class Solution {

        class ListNodeWrapper implements Comparable<ListNodeWrapper> {
            int listNumber;
            int val;

            ListNodeWrapper(int listNumber, ListNode listNode) {
                this.listNumber = listNumber;