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1. Understanding Java Technology and environment

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

2. Working With Java Primitive Data Types and String APIs

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

3. Working with Java Arrays

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

4. Creating and Using Methods

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

5. Reusing Implementations Through Inheritance

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

6. Handling Exceptions

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

7. Creating a Simple Java Program

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

8. Using Operators and Decision Constructs

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

9. 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

10. Applying Encapsulation

• Apply access modifiers
• Apply encapsulation principles to a class

11. Programming Abstractly Through Interfaces

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

12. Understanding Modules

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

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Preparation Guide for 1Z0-815:Java SE 11 Programmer Exam

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