03.java.adv.practice.txt

Collections
===========
- Streams (Refer to Person class here: \\nas\distribution\ref\java\tutorial\collections\streams\examples\Person.java)
1. filter
    - predicates
        - Write a program to filter the Person, who are male and age greater than 21
2. map
    - Write a program to print minimal person with name and email address from the Person class using java.util.Stream<T>#map API
3. findFirst/last/any
    - Write a program to filter the Person, who are male and
        - find the first person from the filtered persons
        - find the last person from the filtered persons
        - find random person from the filtered persons
4. Sum/Max/Min
    - Consider a following code snippet:
        List<Integer> randomNumbers = Array.asList({1, 6, 10, 25, 78})
    - Find the sum of all the numbers in the list using java.util.Stream API
    - Find the maximum of all the numbers in the list using java.util.Stream API
    - Find the minimum of all the numbers in the list using java.util.Stream API
5. Collectors
    - Write a program to collect the minimal person with name and email address from the Person class using java.util.Stream<T>#map API as List
6. Reducer methods(ToInt, ToLong)
    - Write a program to find the average age of all the Person in the person List
7. GroupBy, duplicate removal
   - Consider a following code snippet:
        List<Integer> randomNumbers = Array.asList({1, 6, 10, 1, 25, 78, 10, 25})
   - Get the non-duplicate values from the above list using java.util.Stream API
8. forEach
    - Print all the persons in the roster using java.util.Stream<T>#forEach 
9. lambda
    - sort the roster list based on the person's age in descending order using comparator
10. Iterator
    - Iterate the roster list in Persons class and and print the person without using forLoop/Stream  
11. Sorting
    - sort the roster list based on the person's age in descending order using java.util.Stream
12. Addition/Update/Deletion of element to and from collections (addAll(), removeAll, add(), remove(), size())
    - Consider the following code snippet:
        List<Person> newRoster = new ArrayList<>();
        newRoster.add(
            new Person(
            "John",
            IsoChronology.INSTANCE.date(1980, 6, 20),
            Person.Sex.MALE,
            "john@example.com"));
        newRoster.add(
            new Person(
            "Jade",
            IsoChronology.INSTANCE.date(1990, 7, 15),
            Person.Sex.FEMALE, "jade@example.com"));
        newRoster.add(
            new Person(
            "Donald",
            IsoChronology.INSTANCE.date(1991, 8, 13),
            Person.Sex.MALE, "donald@example.com"));
        newRoster.add(
            new Person(
            "Bob",
            IsoChronology.INSTANCE.date(2000, 9, 12),
            Person.Sex.MALE, "bob@example.com"));
    - Create the roster from the Person class and add each person in the newRoster to the existing list and print the new roster List.
    - Print the number of persons in roster List after the above addition.
    - Remove the all the person in the roster list
13. Contains
    - Consider the following Person:
        new Person(
            "Bob",
            IsoChronology.INSTANCE.date(2000, 9, 12),
            Person.Sex.MALE, "bob@example.com"));
   - Check if the above person is in the roster list obtained from Person class.
14. retain() vs remove()
    - Consider the following code snippet:
        List<Person> newRoster = new ArrayList<>();
        newRoster.add(
            new Person(
            "John",
            IsoChronology.INSTANCE.date(1980, 6, 20),
            Person.Sex.MALE,
            "john@example.com"));
        newRoster.add(
            new Person(
            "Jade",
            IsoChronology.INSTANCE.date(1990, 7, 15),
            Person.Sex.FEMALE, "jade@example.com"));
        newRoster.add(
            new Person(
            "Donald",
            IsoChronology.INSTANCE.date(1991, 8, 13),
            Person.Sex.MALE, "donald@example.com"));
        newRoster.add(
            new Person(
            "Bob",
            IsoChronology.INSTANCE.date(2000, 9, 12),
            Person.Sex.MALE, "bob@example.com"));
   - Remove the only person who are in the newRoster from the roster list.
   - Remove the following person from the roster List:
        new Person(
            "Bob",
            IsoChronology.INSTANCE.date(2000, 9, 12),
            Person.Sex.MALE, "bob@example.com"));

IO/NIO
======
1. Reading a file using InputStream
2. Reading a file using Reader
3. Read a any text file using BufferedReader and print the content of the file
4. Write some String content using OutputStream
5. Write some String content using Writer
6. Read a file using java.io.File
7. Read a file using java.nio.Files using Paths
8. Reading a CSV file using java.nio.Files API as List string with each row in CSV as a String
9. Given a path, check if path is file or directory
10. InputStream to String and vice versa
11. Object to inputStream and vice versa    
12. Number of files in a directory and number of directories in a directory
13. Get the permission allowed for a file
14. Get the file names of all file with specific extension in a directory
15. Create two paths and test whether they represent same path

Properties
==========
1. Get and print a configurable property based on following priority:
  - args passed for java cmd
  - if not avaialble as cmd args, try to get from System env variables
  - if not available from Sys Env, try to get from a customized .properties file (D:\temp\customize.properties)
  - if not available in customized props files, get from a default .properties file (\\nas\Distribution\training\temp\default.properties)
  - if not available in default props, load from a harcoded default constant
Try to use Properties.setParent() heirarchy mechanism to set out the priorities
2. Load and print localized greetings text based on a given Locale (in_en and in_ta)