14:46 14-07-2019
Finished the Solo
Hi!
I`ve finished Solo on Keyboard in English! All tasks without mistakes (mark A). So my results is 28 words per minute or about 169 symbols. It's average result. If I want to improve it I should type texts in English during next 2-3 months. Maybe I'll do it here.
Next week I'll be absent because I'm going to Lago-Naki on the Thirtieth route. Good luck. )))
And another news is that I tought my daughter to ride two-wheeled bicycle! We overcome together 7 kilometers at a time! I'm so happy!
Состояние: отличное
I`ve finished Solo on Keyboard in English! All tasks without mistakes (mark A). So my results is 28 words per minute or about 169 symbols. It's average result. If I want to improve it I should type texts in English during next 2-3 months. Maybe I'll do it here.
Next week I'll be absent because I'm going to Lago-Naki on the Thirtieth route. Good luck. )))
And another news is that I tought my daughter to ride two-wheeled bicycle! We overcome together 7 kilometers at a time! I'm so happy!
Состояние: отличное
Группы: [ english ]
22:51 02-06-2019
First competition for my daughter and 69 for me
There is gymnastics competition today for my daughter. She took the third place. I proud of her.
I'm at 69 excercise in Solo (English touch-typing).
Current music: Mario Basanov feat. Jurga 5th season
I'm at 69 excercise in Solo (English touch-typing).
Current music: Mario Basanov feat. Jurga 5th season
Группы: [ english ]
15:34 31-07-2017
Key Thread methods
Italic is static methods
Состояние: настороже 
Состояние: настороже
14:24 27-07-2017
inner class
Just as a static method does not have access to the instance variables and
nonstatic methods of the class, a static nested class does not have access to the instance
variables and nonstatic methods of the outer class.
Method-local inner classes cannot use non-final local variables declared within the method—the inner class instance
may outlive the stack frame, so the local variable might vanish while the inner class
object is still alive.
Состояние: учиться
nonstatic methods of the class, a static nested class does not have access to the instance
variables and nonstatic methods of the outer class.
Method-local inner classes cannot use non-final local variables declared within the method—the inner class instance
may outlive the stack frame, so the local variable might vanish while the inner class
object is still alive.
Состояние: учиться
08:20 26-07-2017
Sub, Arrays, Collections, Set, Map, List
All the tables
Состояние: сонное 
Состояние: сонное
16:26 25-07-2017
Collections
Table
Состояние: учиться 
Состояние: учиться
11:50 24-07-2017
Date & Calendar
Состояние: креативное 
18:26 23-07-2017
string methods
■charAt() Returns the character located at the specified index
■ concat() Appends one String to the end of another ( "+" also works)
■ equalsIgnoreCase() Determines the equality of two Strings, ignoring case
■ length() Returns the number of characters in a String
■ replace() Replaces occurrences of a character with a new character
■ substring() Returns a part of a String
■ toLowerCase() Returns a String with uppercase characters converted
■ toString() Returns the value of a String
■ toUpperCase() Returns a String with lowercase characters converted
■ trim() Removes whitespace from the ends of a String
Current music: Kiss You (Ruby Edit) - Nadia Ali
Состояние: учиться
■ concat() Appends one String to the end of another ( "+" also works)
■ equalsIgnoreCase() Determines the equality of two Strings, ignoring case
■ length() Returns the number of characters in a String
■ replace() Replaces occurrences of a character with a new character
■ substring() Returns a part of a String
■ toLowerCase() Returns a String with uppercase characters converted
■ toString() Returns the value of a String
■ toUpperCase() Returns a String with lowercase characters converted
■ trim() Removes whitespace from the ends of a String
Current music: Kiss You (Ruby Edit) - Nadia Ali
Состояние: учиться
14:25 23-07-2017
exceptions
ArrayIndexOutOfBoundsException Thrown when attempting to access an array with an invalid index value (either negative or beyond the length of the array).
CassCastException Thrown when attempting to cast a reference variable to a type that fails the IS-A test.
IllegalArgumentException Thrown when a method receives an argument formatted differently than the method expects.
IllegalStateException Thrown when the state of the environment doesn’t match the operation being attempted, e.g., using a Scanner that’s been closed.
NullPointerException Thrown when attempting to access an object with a reference variable whose current value is null.
NumberFormatException Thrown when a method that converts a String to a number receives a String that it cannot convert.
AssertionError Thrown when a statement’s boolean test returns false.
ExceptionInInitializerError Thrown when attempting to initialize a static variable or an initialization block.
StackOverflowError Typically thrown when a method recurses too deeply. (Each invocation is added to the stack.)
NoClassDefFoundError Thrown when the JVM can’t find a class it needs, because of a command-line error, a classpath issue, or a missing .class file.
Current music: Electricity Drive (The Lost Radio Version) - Alphawezen
Состояние: учиться
CassCastException Thrown when attempting to cast a reference variable to a type that fails the IS-A test.
IllegalArgumentException Thrown when a method receives an argument formatted differently than the method expects.
IllegalStateException Thrown when the state of the environment doesn’t match the operation being attempted, e.g., using a Scanner that’s been closed.
NullPointerException Thrown when attempting to access an object with a reference variable whose current value is null.
NumberFormatException Thrown when a method that converts a String to a number receives a String that it cannot convert.
AssertionError Thrown when a statement’s boolean test returns false.
ExceptionInInitializerError Thrown when attempting to initialize a static variable or an initialization block.
StackOverflowError Typically thrown when a method recurses too deeply. (Each invocation is added to the stack.)
NoClassDefFoundError Thrown when the JVM can’t find a class it needs, because of a command-line error, a classpath issue, or a missing .class file.
Current music: Electricity Drive (The Lost Radio Version) - Alphawezen
Состояние: учиться
03:26 23-07-2017
switch
A switch's expression must evaluate to a char, byte, short, int, or, as of Java
6, an enum, as of Java 7, String
That means if you're not using an enum and String, only variables and values
that can be automatically promoted (in other words, implicitly cast) to an int are
acceptable.
The case constant must be a
compile time constant!
Current music: It's My Life - Sound Behaviour
Состояние: учиться
6, an enum, as of Java 7, String
That means if you're not using an enum and String, only variables and values
that can be automatically promoted (in other words, implicitly cast) to an int are
acceptable.
The case constant must be a
compile time constant!
Current music: It's My Life - Sound Behaviour
Состояние: учиться
22:00 21-07-2017
Wrapper
In summary, the essential method signatures for Wrapper conversion methods are
primitive xxxValue() - to convert a Wrapper to a primitive
primitive parseXxx(String) - to convert a String to a primitive
Wrapper valueOf(String) - to convert a String to a Wrapper
In order to save memory, two instances of the
following wrapper objects (created through boxing), will always be == when their
primitive values are the same:
■ Boolean
■ Byte
■ Character from \u0000 to \u007f (7f is 127 in decimal)
■ Short and Integer from -128 to 127
Here's a review of the rules for overloading methods using widening, boxing,
and var-args:
■ Primitive widening uses the "smallest" method argument possible.
■ Used individually, boxing and var-args are compatible with overloading.
■ You CANNOT widen from one wrapper type to another. (IS-A fails.)
■ You CANNOT widen and then box. (An int can't become a Long.)
■ You can box and then widen. (An int can become an Object, via Integer.)
■ You can combine var-args with either widening or boxing
Current music: Радио Яндекс: Dvipada Pitham -The Wise Man
Состояние: прострация
primitive xxxValue() - to convert a Wrapper to a primitive
primitive parseXxx(String) - to convert a String to a primitive
Wrapper valueOf(String) - to convert a String to a Wrapper
In order to save memory, two instances of the
following wrapper objects (created through boxing), will always be == when their
primitive values are the same:
■ Boolean
■ Byte
■ Character from \u0000 to \u007f (7f is 127 in decimal)
■ Short and Integer from -128 to 127
Here's a review of the rules for overloading methods using widening, boxing,
and var-args:
■ Primitive widening uses the "smallest" method argument possible.
■ Used individually, boxing and var-args are compatible with overloading.
■ You CANNOT widen from one wrapper type to another. (IS-A fails.)
■ You CANNOT widen and then box. (An int can't become a Long.)
■ You can box and then widen. (An int can become an Object, via Integer.)
■ You can combine var-args with either widening or boxing
Current music: Радио Яндекс: Dvipada Pitham -The Wise Man
Состояние: прострация
00:34 20-07-2017
Nothing can be returned from a void, but you can return nothing.
Nice play of words!
I learned second chapter of book that helps to prepare for the exam. And...
...another one review of my resume! Tomorrow i will go to Sberbank to take tests. Its interesting, I simply remove from resume phrases like "little experience" and "basic knowledge".
Current music: Wind Song - Fabrizio Paterlini
Состояние: веселое
I learned second chapter of book that helps to prepare for the exam. And...
...another one review of my resume! Tomorrow i will go to Sberbank to take tests. Its interesting, I simply remove from resume phrases like "little experience" and "basic knowledge".
Current music: Wind Song - Fabrizio Paterlini
Состояние: веселое
17:05 19-07-2017
Polymorthysm in Java
I knew it earlier but didn't think about:
"There are two types of polymorphism in java: compile time polymorphism and runtime polymorphism. We can perform polymorphism in java by method overloading and method overriding."
First type of polymothism is overloading. Java compiler determines which overloaded method is invoked by the reference type (not the object type)
Second is overriding. JVM at runtime "see" on instance (real object) and run its methods. Determination by object type.
Animal animal = new Horse();
Reference type Object type
That's why we talk about compile time and runtime polymorthism.
Current music: Om Asa Toma (Original Mix) - The Wise Man
Состояние: учиться
"There are two types of polymorphism in java: compile time polymorphism and runtime polymorphism. We can perform polymorphism in java by method overloading and method overriding."
First type of polymothism is overloading. Java compiler determines which overloaded method is invoked by the reference type (not the object type)
Second is overriding. JVM at runtime "see" on instance (real object) and run its methods. Determination by object type.
Animal animal = new Horse();
Reference type Object type
That's why we talk about compile time and runtime polymorthism.
Current music: Om Asa Toma (Original Mix) - The Wise Man
Состояние: учиться
23:55 17-07-2017
in English
Привет дневничок.
Откопал тебя (свой дневник) из далекого прошлого. Но не просто так. Хочу практиковаться в английском, для этого советуют вести дневник. Поэтому это последние слова на русском...
So, first of all, hello my friend.
There are many stuffs in my life that I should say here. Not in this record. Stay turned. :)
Here I'll simply write about today events. This events are very simple too. All this day i studied. I read the book SCJP (Sun Certified Programmer for Java 6 Study Guide). Yes, this book about Java. About how take the exam. And its in English. And I'm so happy that I can read this book without looking in english dictionary every 2 minutes (because Google Translate =).
I hope to be a Java Junior for a start. And my first job interview should take place next week.
This is just the beginning, so, not saying goodbuy!
Current music: Hypnose (2011 Version) - Melodic Brothers
Состояние: креативное
Откопал тебя (свой дневник) из далекого прошлого. Но не просто так. Хочу практиковаться в английском, для этого советуют вести дневник. Поэтому это последние слова на русском...
So, first of all, hello my friend.
There are many stuffs in my life that I should say here. Not in this record. Stay turned. :)
Here I'll simply write about today events. This events are very simple too. All this day i studied. I read the book SCJP (Sun Certified Programmer for Java 6 Study Guide). Yes, this book about Java. About how take the exam. And its in English. And I'm so happy that I can read this book without looking in english dictionary every 2 minutes (because Google Translate =).
I hope to be a Java Junior for a start. And my first job interview should take place next week.
This is just the beginning, so, not saying goodbuy!
Current music: Hypnose (2011 Version) - Melodic Brothers
Состояние: креативное