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Index › Programming Questions & Help › Syntax Questions › More about Integers and Floats
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More about Integers and Floats (Read 632 times)
hampus
More about Integers and Floats
Aug 14th, 2009, 2:31pm  
Hello, another question about floats.
I want a float with no more then one decimal and I managed to achieve this by writing:

Code:

float a = PI;
int b = 2;
print(float(int(a/(b+.0)*10))/10); //Prints 1.5


but I pretend there must be an easier way?
h
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NoChinDeluxe
Re: More about Integers and Floats
Reply #1 - Aug 15th, 2009, 9:00am  
This is an excruciatingly round-about way of going about this, but it works. Not sure if there is something more efficient. You could easily just stick this stuff in its own class, or even just a custom method to simplify the process in your actual code.

Code:

import java.util.Formatter; //have to import this first
Formatter formatter = new Formatter(); //initialize class

formatter.format("%.2f", 123.456789); // number and precision
String s = formatter.toString(); //convert result to string
try{
  float f = Float.valueOf(s).floatValue(); //convert to float
  println("float f = "+f); //prints 123.45
} catch(NumberFormatException nfe){
  println("NumberFormatException: "+nfe.getMessage());
}
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fry
Re: More about Integers and Floats
Reply #2 - Aug 15th, 2009, 9:29am  
Use nf().

String formatted = nf(HALF_PI, 1);
println(formatted);
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