Need To Solve The Equation

[moyphus]

Hi To All,

I have an equation in string like this

((BASIC+HRA)*(30/100))
Using replace function
Now i replaced this into values...
String formula = ((10000+3000)*(30/100))

whole thing as a string now 'Formula'...

How can i calculate this formula

float amt = formula;

Now i have an error...type casting....i can't calculate this amt

[puneetkay]

Hi To All,

I have an equation in string like this

((BASIC+HRA)*(30/100)) Using replace function Now i replaced this into values... String formula = ((10000+3000)*(30/100))

whole thing as a string now 'Formula'...

How can i calculate this formula

float amt = formula;

Now i have an error...type casting....i can't calculate this amt

float amt = Float.parseFloat(formula);

and btw why are you storing equation result in string ?

better way :

float amt = ((10000+3000)*(30/100));

Regard,

[moyphus]

float amt = Float.parseFloat(formula);

and btw why are you storing equation result in string ?

better way :

float amt = ((10000+3000)*(30/100));

Regard,

Hi Thanks For The Reply...

i already used that,But its not worked.....If There any other solution to solve this,.,.,

[moyphus]

Hi,.,

Actually Before that i have like this ,.,((BASIC+HRA)*(30/100))
This is coming from database as a whole equation...
I'm replacing the Strings into values based on that BASIC And HRA,,,.

So it is String type,...i need to calculate that based on that formula,.,.,

[puneetkay]

Hi Thanks For The Reply...

i already used that,But its not worked.....If There any other solution to solve this,.,.,

double amt = ((10000.0+3000.0)*(30.0/100.0));
System.out.println(amt);

Working fine.

Output : 3900.0

if still not working, Please post the code related to the problem.

[moyphus]

Hi,,Tanx,.,

Here my code,

formula = compList.getPrformula(); // Here i'm getting value Like ((BASIC+HRA)*(30/100))
derFrom = compList.getDerivedFrom(); //Here, BASIC,HRA
derFrom1 = derFrom.split(",");
for (int i=0;i0){
comp = new ArrayList();
comp1 = new ArrayList();
String[] com={};
for (int j = 0;j();
for (int j = 0;j

[javaAddict]

Is formula a String? :

formula = "((10000.00+4000.00)*(30/100))";

If yes then this will not work:

double amout = Double.valueOf(formula);

The String formula has to have a numeric value. Like "2" or "-100.345".
If it has value: "((10000.00+4000.00)*(30/100))" it will not work.
You need to extract the numbers from the String formula, turn them into numbers (parseDouble() or parseFloat()) and then apply the operators (+, -, *, /)