sorting problem

[vasug]

hi,
Quantity column is of type integer. I need to sort it as integers. I am able to sort the quantity column as strings but not integers. I am giving both the string related and integer related code as follows.


-----------considering quantity as string -----------working-------------
public String sortByQuantity(){
Comparator c = new DbRow(){
public int compare(Object o1, Object o2){
DbRow n1 = (DbRow)o1; DbRow n2 = (DbRow)o2;
return n1.getQuantity().compareTo(n2.getQuantity());
}
};
Arrays.sort(dbrowMain , c);
return null;
}
-------considering quantity as integer type----not working--------
public Integer sortByQuantity(){
Comparator c = new DbRow(){
public int compareTo(Object o1, Object o2){
DbRow n1 = (DbRow)o1; DbRow n2 = (DbRow)o2;

Integer s1= new Integer(n1.getQuantity());
Integer s2 = new Integer(n2.getQuantity());
return s1.compareTo(s2);
}
};
Arrays.sort(dbrowMain , c);
return null;
}

Could you please mention the please give me answer

Thanks in Advance
Vasu

[JosAH]

hi,
Quantity column is of type integer. I need to sort it as integers. I am able to sort the quantity column as strings but not integers. I am giving both the string related and integer related code as follows.


-----------considering quantity as string -----------working-------------
public String sortByQuantity(){
Comparator c = new DbRow(){
public int compare(Object o1, Object o2){
DbRow n1 = (DbRow)o1; DbRow n2 = (DbRow)o2;
return n1.getQuantity().compareTo(n2.getQuantity());
}
};
Arrays.sort(dbrowMain , c);
return null;
}
-------considering quantity as integer type----not working--------
public Integer sortByQuantity(){
Comparator c = new DbRow(){
public int compareTo(Object o1, Object o2){
DbRow n1 = (DbRow)o1; DbRow n2 = (DbRow)o2;

Integer s1= new Integer(n1.getQuantity());
Integer s2 = new Integer(n2.getQuantity());
return s1.compareTo(s2);
}
};
Arrays.sort(dbrowMain , c);
return null;
}

Could you please mention the please give me answer

Thanks in Advance
Vasu

What is the return type of the method getQuantity()? If it is a String it doesn't surprise me that you can't convert it to Integers that way. Have a look at the Integer.parseInt(... ) method instead; it converts Strings to ints.

kind regards,

Jos

[Anjaneyulu]

Hello vasu it is better to post the complete code.Then it is easy to trace