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Convert String To Double

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In this section, we are going to convert a numeric type string value into a double.

Convert String To Double

     

In this section, we are going to convert a numeric type string value into a double. The double supports big-integer value. 

Code Description:

This program simply takes a numeric type string at the console with the "Enter numeric type string value:" message and it converts into a double. The doubleValue() method returns the double value of this double object. And Double class wraps a value of the primitive type double in an object. Finally, it we get the value to be converted into a double.

Here is this the code of this program:

import java.io.*;
import java.lang.*;

public class StringToDouble{
  public static void main (String[] argsthrows IOException{
  BufferedReader bff= new BufferedReader(new InputStreamReader(System.in));
  System.out.println("Enter numeric type string value:");
  String num = bff.readLine();
  try{
  double d = Double.valueOf(num.trim()).doubleValue();
  System.out.println("double d = " + d);
  }
  catch (NumberFormatException e){
  System.out.println("NumberFormatException: " + e.getMessage());
  }
  }
}

Download this program:

Output of this program given below.

C:\corejava>java StringToDouble
Enter string value:
23
double d = 23.0
C:\corejava>
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Posted on: July 5, 2007

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