2012 yılında, o sırada gerçekleştireceğiniz bir projede hangi dili kullanacağımız konusunda kararsız kalmıştık. Ben Python yanlısıydım ve görüşümü desteklemek için Java ve Python'u yapısal ve performans olarak kıyaslayan nu sunumu hazırlamıştım. Benzer kararsızlıklar yaşayanlara faydalı olmasını umuyorum.

1. Python mu Java mı?
VS
© Ahmet Erkan ÇELİK Haziran 2012

2. JAVA TEMİZDİR!
 Örneğin şöyle bir JAVA sınıfını
public class Employee
{
private String myEmployeeName;
private int myTaxDeductions = 1;
private String myMaritalStatus = "single";
//--------- constructor #1 -------------
public Employee(String EmployeName)
{
this(employeeName, 1);
}
//--------- constructor #2 -------------
public Employee(String EmployeName, int taxDeductions)
{
this(employeeName, taxDeductions, "single");
}
//--------- constructor #3 -------------
public Employee(String EmployeName,
int taxDeductions,
String maritalStatus)
{
this.employeeName = employeeName;
this.taxDeductions = taxDeductions;
this.maritalStatus = maritalStatus;
}
}© Ahmet Erkan ÇELİK Haziran 2012

3. PYTHON DAHA TEMİZDİR
 Python ile yazacak olursak
class Employee():
def __init__(self,
employeeName
, taxDeductions=1
, maritalStatus="single"
):
self.employeeName = employeeName
self.taxDeductions = taxDeductions
self.maritalStatus = maritalStatus
© Ahmet Erkan ÇELİK Haziran 2012

4. JAVA Hızlıdır
 projecteuler.net problemlerinden 22. soru:
Using names.txt (right click and 'Save Link/Target As...'), a 46K text file containing
over five-thousand first names, begin by sorting it into alphabetical order. Then
working out the alphabetical value for each name, multiply this value by its
alphabetical position in the list to obtain a name score.
For example, when the list is sorted into alphabetical order, COLIN, which is worth 3
+ 15 + 12 + 9 + 14 = 53, is the 938th name in the list. So, COLIN would obtain a
score of 938 53 = 49714.
What is the total of all the name scores in the file?
© Ahmet Erkan ÇELİK Haziran 2012

5. JAVA Hızlıdır!
Java ile çözümü
import java.util.Arrays;
import java.lang.StringBuilder;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class euler22
{
public static String readFileAsString(String path) throws IOException
{
StringBuilder builder = new StringBuilder();
BufferedReader reader = new BufferedReader(
new FileReader(path));
String buffer = null;
while((buffer = reader.readLine()) != null)
{
builder.append(buffer);
}
reader.close();
return builder.toString();
}
public static void main(String[] args) throws IOException
{
String[] names = fileAsString("names.txt").replace(""", "").split(",");
int total = 0;
Arrays.sort(names);
for(int i = 0; i < names.length; ++i)
{
int sum = 0;
for(char c : names[i].toCharArray())
{
sum += c - 'A' + 1;
}
total += (i + 1) * sum;
}
System.out.println(total);
}
}
Kod çalışma süresi : ~0.3s
© Ahmet Erkan ÇELİK Haziran 2012

6. Python Daha hızlıdır!
Python ile çözümü
def main():
names = open("names.txt", "r").read().replace(""", "").split(",")
names.sort()
print sum((i + 1) * sum(ord(c) - ord('A') + 1 for c in n) for i, n in enumerate(names))
if __name__ == "__main__":
main()
Kod çalışma süresi : ~0.05s
© Ahmet Erkan ÇELİK Haziran 2012

7. Framework Çözümleri
Python Frameworkleri Java Frameworkleri
• Tornado
• Django
• Grok
• Pylons
• TurboGears
• Web2Py
• Zope
• CubicWeb
• Enamel
• GAE Framework
• Gizmo (QP)
• Glashammer
• Karrigell
• Kiss.py
• Nagare
• …
• Tapestry
• Cocoon
• MyFaces
• Spring
• Google Web Toolkit
• Turbine
• Makumba
• Stripes
• JPublish
• JOSSO
• wings
• Strecks
• AribaWeb
• Playframework
• Anvil
• …© Ahmet Erkan ÇELİK Haziran 2012

8. Kaynaklar
 http://pythonconquerstheuniverse.wordpress.com
/2009/10/03/python-java-a-side-by-side-
comparison/
 http://codereview.stackexchange.com/questions/1
0997/python-vs-java-runtime-on-euler-22
 http://wiki.python.org/moin/WebFrameworks
 http://java-source.net/open-source/web-
frameworks
© Ahmet Erkan ÇELİK Haziran 2012