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30 years before and after
30 years before and after
 
 
A fixed point
A fixed point
 
 
A simple calculator
A simple calculator
 
 
Add 11 hours and print the date
Add 11 hours and print the date
 
 
Add days and subtract hours
Add days and subtract hours
 
 
Adding N minutes
Adding N minutes
 
 
Alternating Fibonacci numbers
Alternating Fibonacci numbers
 
 
An expression with large numbers
An expression with large numbers
 
 
Are siblings
Are siblings
 
 
Area of a circle
Area of a circle
 
 
Avoid NPE
Avoid NPE
 
 
Boxes are not just objects!
Boxes are not just objects!
 
 
Bus tour
Bus tour
 
 
Calculate the number of distinct characters
Calculate the number of distinct characters
 
 
Calculator with four methods
Calculator with four methods
 
 
Calculator
Calculator
 
 
Check for null
Check for null
 
 
Check whether a number is prime
Check whether a number is prime
 
 
Classes for Hospital
Classes for Hospital
 
 
Companies
Companies
 
 
Comparing strings ignoring whitespaces
Comparing strings ignoring whitespaces
 
 
Compression algorithm
Compression algorithm
 
 
Convert to byte array
Convert to byte array
 
 
Convert to bytes
Convert to bytes
 
 
Count elements of an array in another one
Count elements of an array in another one
 
 
Count words
Count words
 
 
Creating a closure
Creating a closure
 
 
Decompose a math function
Decompose a math function
 
 
Decrement all
Decrement all
 
 
Difference of times
Difference of times
 
 
Digits from 0 to 9 in a single line
Digits from 0 to 9 in a single line
 
 
Direction
Direction
 
 
Don't be late again
Don't be late again
 
 
Execute Callable objects
Execute Callable objects
 
 
Find the first occurrence of the word the
Find the first occurrence of the word the
 
 
Find the seed
Find the seed
 
 
Finding a collection of elements in a sorted array
Finding a collection of elements in a sorted array
 
 
Finding and starting a thread
Finding and starting a thread
 
 
Generate random numbers
Generate random numbers
 
 
Getting current thread info
Getting current thread info
 
 
Greek letters
Greek letters
 
 
Handling interruptions
Handling interruptions
 
 
How many Callable objects are there
How many Callable objects are there
 
 
How many tasks are finished
How many tasks are finished
 
 
Implementing the EntrySet method
Implementing the EntrySet method
 
 
Interrupting a thread
Interrupting a thread
 
 
Invert an array
Invert an array
 
 
Iterations
Iterations
 
 
K-combination
K-combination
 
 
Leap year
Leap year
 
 
Max of two integers (1)
Max of two integers (1)
 
 
Max of two integers/src
Max of two integers/src
 
 
Message notifier as a thread
Message notifier as a thread
 
 
Messaging
Messaging
 
 
Move the pivot
Move the pivot
 
 
Multithreaded counter
Multithreaded counter
 
 
Number of decompositions
Number of decompositions
 
 
Number of occurrences
Number of occurrences
 
 
Only true or false
Only true or false
 
 
Ordering the execution of threads
Ordering the execution of threads
 
 
Palindrome
Palindrome
 
 
Pastry packing optimization
Pastry packing optimization
 
 
Phone Book
Phone Book
 
 
Return empty string when argument is null
Return empty string when argument is null
 
 
Return time without seconds
Return time without seconds
 
 
Reverse input text
Reverse input text
 
 
Reversing input numbers
Reversing input numbers
 
 
Safe converting
Safe converting
 
 
Searching in a descending sorted array
Searching in a descending sorted array
 
 
Seconds between two time points
Seconds between two time points
 
 
Seconds since start of a day
Seconds since start of a day
 
 
Shape
Shape
 
 
Split a list into sublists
Split a list into sublists
 
 
Starting runnables
Starting runnables
 
 
Starting threads
Starting threads
 
 
String reverser
String reverser
 
 
Ternary predicate
Ternary predicate
 
 
The New Year is coming (or not)
The New Year is coming (or not)
 
 
The countdown
The countdown
 
 
The first and the last day of a month
The first and the last day of a month
 
 
The first element
The first element
 
 
The intersection of time ranges
The intersection of time ranges
 
 
The n-th day from the end of a month
The n-th day from the end of a month
 
 
The percentage of G and C characters
The percentage of G and C characters
 
 
The sequence
The sequence
 
 
The smallest value
The smallest value
 
 
The sum of array elements
The sum of array elements
 
 
Thread-safe account
Thread-safe account
 
 
VeganPizza
VeganPizza
 
 
README.md
README.md
 
 
lesson-info.yaml
lesson-info.yaml
 
 

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HyperSkill-Problems

Decision of tasks from HyperSkill project. Many thanks for good practice to https://hyperskill.org/ in context of learning Java Developer course.

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Java exircises from Hyperskill school

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