Petit programme en JAVA

slt,

SVP, aidez-moi à exécuter cet programme :)
.................................................................................................................
package date1;

public class Main {

public class Date
{
private int jj,mm,aaaa;
private Date(int jj,int mm,int aaaa)
{
this.jj=jj;
this.mm=mm;
this.aaaa=aaaa;
}
}
void nbr_jrs(Date t)
{
int m=t.mm;
switch(m)
{
case 1:System.out.println("nbr_jrs = 31");break;
case 2:System.out.println("nbr_jrs = 28");break;
case 3:System.out.println("nbr_jrs = 31");break;
case 4:System.out.println("nbr_jrs = 30");break;
case 5:System.out.println("nbr_jrs = 31");break;
case 6:System.out.println("nbr_jrs = 30");break;
case 7:System.out.println("nbr_jrs = 31");break;
case 8:System.out.println("nbr_jrs = 31");break;
case 9:System.out.println("nbr_jrs = 30");break;
case 10:System.out.println("nbr_jrs = 31");break;
case 11:System.out.println("nbr_jrs = 30");break;
case 12:System.out.println("nbr_jrs = 31");break;
}
}
int date_v(Date t)
{
int j=t.jj,m=t.mm,a=t.aaaa;
if(j<1 || j>31)
return 0;
else if(m<1 || m>12)
return 0;
else if(a<1)
return 0;
else
return 1;
}
void date_d(Date t)
{
int j=t.jj,m=t.mm,a=t.aaaa;
if(j==31 || j==30 || j==28)
{
j=1;
m++;
}
if(m>=12)
{
m=1;
a++;
}
System.out.println("Demain est: "+j+"/"+m+"/"+a);
}
public class Test_Date
{
public void main(String[] args)
{
Date t = null;
t.jj=Integer.parseInt(args[0]);
t.mm=Integer.parseInt(args[1]);
t.aaaa=Integer.parseInt(args[2]);
System.out.println("La Date: "+t.jj+"/"+t.mm+"/"+t.aaaa);
int k=date_v(t);
if(k==1)
{
nbr_jrs(t);
date_d(t);
}
else
System.out.println("ERREUR!!");
}
}
}
.................................................................................................................
run:
java.lang.NoSuchMethodError: main
Exception in thread "main" Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

!!!!!!!
Qu'est ce que je vais faire ? :)
Aidez-moi svp