Victor-Hechel/Java11-Programmer1-Guide

Study Guide for Java SE 11 Programmer I Exam (1Z0-815)

Java SE 11 Programmer I

Study Guide for Java SE 11 Programmer I Exam (1Z0-815)

Content

Understanding Java Technology and environment

• Describe Java Technology and the Java development
• Identify key features of the Java language

Creating a Simple Java Program

• Create an executable Java program with a main class
• Compile and run a Java program from the command line
• Create and import packages

Working With Java Primitive Data Types and String APIs

• Declare and initialize variables (including casting and promoting primitive data types)
• Identify the scope of variables
• Use local variable type inference
• Create and manipulate Strings
• Manipulate data using the StringBuilder class and its methods

Using Operators and Decision Constructs

• Use Java operators including the use of parentheses to override operator precedence
• Use Java control statements including if, if/else, switch
• Create and use do/while, while, for and for each loops, including nested loops, use break and continue statements

Working with Java Arrays

• Declare, instantiate, initialize and use a one-dimensional array
• Declare, instantiate, initialize and use a two-dimensional array

Describing and Using Objects and Classes

• Declare and instantiate Java objects, and explain objects' lifecycles (including creation, dereferencing by reassignment, and garbage collection)
• Define the structure of a Java class
• Read or write to object fields

Creating and Using Methods

• Create methods and constructors with arguments and return values
• Create and invoke overloaded methods
• Apply the static keyword to methods and fields

Applying Encapsulation

• Apply access modifiers
• Apply encapsulation principles to a class

Reusing Implementations Through Inheritance

• Create and use subclasses and superclasses
• Create and extend abstract classes
• Enable polymorphism by overriding methods
• Utilize polymorphism to cast and call methods, differentiating object type versus reference type
• Distinguish overloading, overriding, and hiding

Programming Abstractly Through Interfaces

• Create and implement interfaces
• Distinguish class inheritance from interface inheritance including abstract classes
• Declare and use List and ArrayList instances
• Understanding Lambda Expressions

Handling Exceptions

• Describe the advantages of Exception handling and differentiate among checked, unchecked exceptions, and Errors
• Create try-catch blocks and determine how exceptions alter program flow
• Create and invoke a method that throws an exception

Understanding Modules

• Describe the Modular JDK
• Declare modules and enable access between modules
• Describe how a modular project is compiled and run