http://java.dzone.com/news/will-google-app-engine-ever-su
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Did you already code the application in Java? You will be better off using Python anyway. Its much more straightforward which means development will be faster and maintenance easier. This is probably why Google is not in a hurry to add Java support.

Here's an example. First, the Python code:

class Employee():

def __init__(self,
employeeName, taxDeductions=1, maritalStatus="single"):

self.employeeName = employeeName
self.taxDeductions = taxDeductions
self.maritalStatus = maritalStatus


Now the equivalent Java code:

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;
}
Source(s):
23 years programming experience including Java and Python.
Also http://www.ferg.org/projects/python_java_side-by-side.html

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Ha, well it does now! All smiles :)
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