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06.05.2004 at 01:29PM PDT, ID: 21014715
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convert string to int
Tags: string, int, convert

Just two questions:
how can I convert a string to an int?

how can I round a float to two decimal places?

Thanksh
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Question Stats
Zone: Programming
Question Asked By: ram_os
Solution Provided By: twobitadder
Participating Experts: 8
Solution Grade: A
Views: 650
Translate:
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06.05.2004 at 01:52PM PDT, ID: 11241110

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06.05.2004 at 01:52PM PDT, ID: 11241111

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06.05.2004 at 02:30PM PDT, ID: 11241236

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06.05.2004 at 02:58PM PDT, ID: 11241305

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06.05.2004 at 03:16PM PDT, ID: 11241356

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06.07.2004 at 06:48AM PDT, ID: 11249223

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06.07.2004 at 07:57AM PDT, ID: 11249999

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06.07.2004 at 11:14AM PDT, ID: 11251911

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06.07.2004 at 02:17PM PDT, ID: 11253573

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11.05.2004 at 09:04PM PST, ID: 12511576

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11.06.2004 at 03:27AM PST, ID: 12512557

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04.09.2005 at 11:14AM PDT, ID: 13744414

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06.05.2004 at 01:52PM PDT, ID: 11241110
1.
Integer.parseInt(theString);  //Throws a NumberFormatException if the string doesn't just contain numbers.

2.
You can do:
theFloat = 100*(Math.round(theFloat/100));

since Math.round(float floatValue) returns the nearest integer.

This won't display it to 2 d.p.s if that's what you mean though.
Accepted Solution
 
06.05.2004 at 01:52PM PDT, ID: 11241111

Rank: Master

Use Integer.parseInt() and Float.parseFloat() :


      //--- convert string to int...
      String s = "42";
      int i = Integer.parseInt(s);


      //--- convert string to float...
      String s2 = "42.12345";

      float f = Float.parseFloat(s2);

      //--- keep only the 2 decimal places...
      f = Math.round(f*100)/100f;


      System.out.println("   int = [" + i + "]\n" +
                         " float = [" + f + "]\n");
 
06.05.2004 at 02:30PM PDT, ID: 11241236

Rank: Master

just in case it wasn't explicit enough, this is the portion in my above example that keeps only the two most significant digits :

      //--- keep only the 2 decimal places...
      f = Math.round(f*100)/100f;
 
06.05.2004 at 02:58PM PDT, ID: 11241305

Rank: Genius

>>how can I round a float to two decimal places?

DecimalFormat df = new DecimalFormat("0.00");
float pi = 3.142F;
String piTwoDP = df.format(pi);
System.out.println(piTwoDP);
Assisted Solution
 
06.05.2004 at 03:16PM PDT, ID: 11241356

Rank: Genius

Use the BigDecimal class to control the number of decimal places

http://www.javaalmanac.com/egs/java.math/PrintBigDec.html
 
06.07.2004 at 06:48AM PDT, ID: 11249223
After using Integer.parseInt to convert the String ...

use Integer.parseInt(str).intValue() to convert it to an int value rather than leaving it as Integer object...this will be required sometimes...
 
06.07.2004 at 07:57AM PDT, ID: 11249999

Rank: Master

madhava_varma -  Integer.parseInt() already returns an int (not an Integer).

 
06.07.2004 at 11:14AM PDT, ID: 11251911
Thanks People.
 
06.07.2004 at 02:17PM PDT, ID: 11253573

Rank: Genius

:-)
 
11.05.2004 at 09:04PM PST, ID: 12511576
I can't use Integer.parseInt() because the mgs: 'Integer' is undefined.
Why?
 
11.06.2004 at 03:27AM PST, ID: 12512557

Rank: Genius

Can you compile *anything*?
 
04.09.2005 at 11:14AM PDT, ID: 13744414
Integer.parseInt(String) returns int
 
 
10.21.2007 at 10:19PM PDT, ID: 20120958
int i = Integer.parseInt(s);


www.codepal.co.nr
 
 
 
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