筆記 』在部落格放程式碼

想要在部落格裡放入程式碼

但是不想用一般（字有可能因為換行跑掉）的貼上

範例呈現方式：

 

實現方法：

 

先到  https://gist.github.com

複製script

 

在部落格打文章這裡：

按下原始碼，貼上剛剛複製來的

再按一下原始碼回到原本發表文章模式，會什麼都沒有看到，沒看到東西是正常的

寫好文章，發表在部落格上就會出現了

 

 

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筆記 』OCA Java SE 8 考試範圍

Oracle Certified Associate, Java SE 8 Programmer

考試號碼：1Z0-808

考試網站：

https://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=5001&get_params=p_exam_id:1Z0-808

 

TOPICS

Java Basics 

• Define the scope of variables 


• Define the structure of a Java class


• Create executable Java applications with a main method; run a Java program from the command line; including console output.


• Import other Java packages to make them accessible in your code


• Compare and contrast the features and components of Java such as: platform independence, object orientation, encapsulation, etc.

Working With Java Data Types 

• Declare and initialize variables (including casting of primitive data types)


• Differentiate between object reference variables and primitive variables


• Know how to read or write to object fields


• Explain an Object's Lifecycle (creation, "dereference by reassignment" and garbage collection)


• Develop code that uses wrapper classes such as Boolean, Double, and Integer.  

Using Operators and Decision Constructs 

• Use Java operators; including parentheses to override operator precedence


• Test equality between Strings and other objects using == and equals ()


• Create if and if/else and ternary constructs 


• Use a switch statement 

Creating and Using Arrays 

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


• Declare, instantiate, initialize and use multi-dimensional array

Using Loop Constructs 

• Create and use while loops


• Create and use for loops including the enhanced for loop


• Create and use do/while loops


• Compare loop constructs


• Use break and continue  

Working with Methods and Encapsulation 

• Create methods with arguments and return values; including overloaded methods


• Apply the static keyword  to methods and fields  


• Create and overload constructors; including impact on default constructors


• Apply access modifiers


• Apply encapsulation principles to a class


• Determine the effect upon object references and primitive values when they are passed  into methods that change the values

Working with Inheritance 

• Describe inheritance and its benefits


• Develop code that demonstrates the use of polymorphism; including overriding and object type versus reference type


• Determine when casting is necessary


• Use super and this to access objects and constructors


• Use abstract classes and interfaces

Handling Exceptions 

• Differentiate among checked exceptions, unchecked exceptions, and Errors


• Create a try-catch block and determine how exceptions alter normal program flow


• Describe the advantages of Exception handling 


• Create and invoke a method that throws an exception


• "Recognize common exception classes (such as NullPointerException, ArithmeticExcpetion, ArrayIndexOutOfBoundsException, ClassCastException)"

Working with Selected classes from the Java API （8新加的）

• Manipulate data using the StringBuilder class and its methods


• Creating and manipulating Strings


• Create and manipulate calendar data using classes from java.time.LocalDateTime,  java.time.LocalDate, java.time.LocalTime, java.time.format.DateTimeFormatter, java.time.Period 


• Declare and use an ArrayList of a given type 


• Write a simple Lambda expression that consumes a Lambda Predicate expression

 

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