Java

Custom NumberFormat

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Join Date: Aug 2009

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gunjannigam gunjannigam is offline

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Custom NumberFormat

Aug 31st, 2009

I want to create a custom NumberFormat which returns empty string for negative values and the double number iteslf for +ve and zero values. Please guide me....................

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puneetkay

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Re: Custom NumberFormat

Aug 31st, 2009

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Originally Posted by gunjannigam

I want to create a custom NumberFormat which returns empty string for negative values and the double number iteslf for +ve and zero values. Please guide me....................

Hello,

This is for you.

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
public class CustomNumberType extends Number{
 
	public double doubleValue() {
		return 0;
	}
 
	public float floatValue() {
		return 0;
	}
 
	public int intValue() {
		return 0;
	}
 
	public long longValue() {
		return 0;
	}
 
}
public class CustomNumberType extends Number{

	public double doubleValue() {
		return 0;
	}

	public float floatValue() {
		return 0;
	}

	public int intValue() {
		return 0;
	}

	public long longValue() {
		return 0;
	}

}

Implement your logic in this class.

Regards,

Puneet Kalra
www.PuneetK.com
Sun Certified Java Programmer

Admin of Pikk - Object Relational Mapping Framework

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Join Date: Aug 2009

Posts: 63

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gunjannigam gunjannigam is offline

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Re: Custom NumberFormat

Aug 31st, 2009

•

Originally Posted by puneetkay

Hello,

This is for you.
Help with Code Tags

java Syntax (Toggle Plain Text)
public class CustomNumberType extends Number{
 
	public double doubleValue() {
		return 0;
	}
 
	public float floatValue() {
		return 0;
	}
 
	public int intValue() {
		return 0;
	}
 
	public long longValue() {
		return 0;
	}
 
}
public class CustomNumberType extends Number{ public double doubleValue() { return 0; } public float floatValue() { return 0; } public int intValue() { return 0; } public long longValue() { return 0; } }
Implement your logic in this class.

Regards,

Sorry, I couldnt get you Puneet.

Wht I need in output is a object of class NumberFormat or ChoiceFormat which will have a label empty string for a -ve value and the number itself for +ve and zero values..................

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Re: Custom NumberFormat

Aug 31st, 2009

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Originally Posted by gunjannigam

I want to create a custom NumberFormat which returns empty string for negative values and the double number iteslf for +ve and zero values. Please guide me....................

Then write a method that:

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
if value is negative return "empty String"
else return the value
if value is negative return "empty String"
else return the value

You need to explain your problem better and show some code

Check out my New Bike at my Public Profile at the "About Me" tab

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Join Date: Aug 2009

Posts: 63

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gunjannigam gunjannigam is offline

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Re: Custom NumberFormat

Aug 31st, 2009

•

Originally Posted by javaAddict

Then write a method that:
Help with Code Tags

Java Syntax (Toggle Plain Text)
if value is negative return "empty String"
else return the value
if value is negative return "empty String" else return the value
You need to explain your problem better and show some code

Well I finally worked it out..........

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
 
 
 
import java.text.FieldPosition;
import java.text.NumberFormat;
import java.text.ParsePosition;
 
class MyNumberFormat extends NumberFormat {
 
    @Override
    public StringBuffer format(double number, StringBuffer toAppendTo,
            FieldPosition pos) {
        if(number>=0)
            return toAppendTo.append(number);
        else 
            return toAppendTo.append("");
    }
 
    @Override
    public StringBuffer format(long number, StringBuffer toAppendTo,
            FieldPosition pos) {
         if(number>=0)
            return toAppendTo.append(number);
        else
            return toAppendTo.append("");
    }
 
    @Override
    public Number parse(String source, ParsePosition parsePosition) {
        throw new UnsupportedOperationException();
    }
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */



import java.text.FieldPosition;
import java.text.NumberFormat;
import java.text.ParsePosition;

class MyNumberFormat extends NumberFormat {

    @Override
    public StringBuffer format(double number, StringBuffer toAppendTo,
            FieldPosition pos) {
        if(number>=0)
            return toAppendTo.append(number);
        else 
            return toAppendTo.append("");
    }

    @Override
    public StringBuffer format(long number, StringBuffer toAppendTo,
            FieldPosition pos) {
         if(number>=0)
            return toAppendTo.append(number);
        else
            return toAppendTo.append("");
    }

    @Override
    public Number parse(String source, ParsePosition parsePosition) {
        throw new UnsupportedOperationException();
    }
}