Java Training Course/Example Programs: Difference between revisions
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All example Java programs can be obtained from a Git repository: | |||
git clone https://github.com/gfis/jtc | |||
===Start with a greeting=== | ===Start with a greeting=== | ||
* '''HelloWorld''' - output only | * '''HelloWorld''' - output only | ||
| Line 32: | Line 34: | ||
===Date and Calendars=== | ===Date and Calendars=== | ||
* '''Age''' - enter a birthday and compute the years, months ... seconds up to now | * '''Age''' - enter a birthday and compute the years, months ... seconds up to now | ||
===Fractional arithmetic=== | |||
* '''GreatestCommonDivisor''' - the first real algorithm | |||
* '''Ratio''' - introduction to object oriented programming (<code>static</static> version) | |||
Revision as of 08:42, 13 November 2017
All example Java programs can be obtained from a Git repository:
git clone https://github.com/gfis/jtc
Start with a greeting
- HelloWorld - output only
Arguments, assignment, elementary String and arithmetic operations
- StringAdd - concatenate argument strings 4 times and print them out
- IntAdd - add 4 integers 4 times and print them
- IntMultiply - multiply 4 integers 4 times and print the product
- LongMultiply - multiply 4 long numbers
Loops (while, for) and conditions (if), arrays ([])
- PowersOf2 - print the powers of 2
- PowersOf2Check - check for increasing sequence
- PowersOf2Backwards - print sequence backwards
- PowersOf2Array - print sequence from an array
Sequences of conditions with switch, if - then - else if ...
- Selamat - print a greeting depending on the hour
- SelamatSwitch - same with
switch ... case ... default - Number10 - print the numbers 1..10
- Number10Method - print the numbers using a class method
- Month - print the indonese name of a month
- Weekday - print the indonese name of a weekday
Sequences of words
- Word1 - print all words with 1 letter
- Word2 - print all words with 2 letters by 2 nested loops
- Word3 - print all words with 3 letters by 3 nested loops
- Word3Cond1 - print words with 3 letters and vowel/consonant conditions, first version
- Word3Cond2 - same, using a method, 2nd version
- Word3Cond3 - same, output on a single line, 3rd version
Filtering files
A filter program reads a file, modifies all lines somehow, and writes them to another file.
- Filter1 - read a file and replace the vowels in each line
- FilterNumber - read a file and replace all digits by their indonese number words
- FilterMulti3 - read the modified output of Word3Cond3 and colorize the known words
Date and Calendars
- Age - enter a birthday and compute the years, months ... seconds up to now
Fractional arithmetic
- GreatestCommonDivisor - the first real algorithm
- Ratio - introduction to object oriented programming (
static</static> version)