Adding two double numbers is a problem

Hi friends..
when we try to add the two double numbers say,
119.52, 10.00
here we should get 129.52
but it is giving as 129.51999999999998
Here i want to round this to two digits after decimal point
if i round the above value i will get 129.52 and the problem will be solved.
But we don't know exactly on what basis we are getting the sum as 129.51999999999998.
Assume that, tomorrow when we are adding some other numbers we may got like
129.51444444444448
when we round this we get 129.51
but actually we have to get 129.52.
If anyone know why the system is giving that wrong sum amount, please give solution to avoid this.
To solve this problem, i tried by converting the double numbers to integers and adding these integers and finally converting the sum into double...like
if
d1= 119.52
d2=10
int x = (int)(119.52*100.00);
int y = (int)(10.00*100.00);
int z = x + y;
double d = (double)(z)/100;
This is working for this case...
But when we are applying this approch to other numbers it is giving problem....
i.e, if i convert like below
int x = (int)(72.46*100.00);
this should give x=7246
but it is giving x=7245
What is the solution for this problem...please give immediate reply.....

Assume that, tomorrow when we are adding some other
numbers we may got like129.51444444444448
That isn't going to happen. The numerical computations are deterministic. The problem lies in your understanding of how numbers work.
This has been repeated before so if you want more detail I suggest you search the forums for discussion on precision and double.
Computers store numbers in binary. The number you are trying to represent is a decimal number. This produces an error in precision.
The same problem exists in decimal notation. Decimal notation can not accurately represent one divided by three (in decimal 0.33333333.....).

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when we try to add the two double numbers say,
119.52, 10.00
here we should get 129.52
but it is giving as 129.51999999999998
This is happening only for sum numbers.
Here i want to round this to two digits after decimal point
if i round the above value i will get 129.52 and the problem will be solved.
But we don't know exactly on what basis we are getting the sum as 129.51999999999998.
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when we round this we get 129.51
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public class Test1
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