how to align decimal points? - Programmers Heaven

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# how to align decimal points?

Posts: 1Member
Does anyone know how to align decimal points in a table in a console application? We havent learned the swing/gui stuff yet in Java but i want to make my output look nice anyway.
[code]
for example \$500.00
\$0.00

should look like this \$500.00
\$ 0.00
[/code]
Thx for any suggestion you may have

• Posts: 218Member
Hi Klypta,
I don't know that there's any easy way to align the decimals in a console app. However, you can always do it "by hand".

Roughly, the algorithm would look like this:

[code]
Vector myTable = new Vector();
...
// Fill in the table.
...

// Find the number with the most digits left of the decimal.
int maxLeftSideDigits = -1;
for (int i=0; i maxLeftSideDigits)
maxLeftSideDigits = decimalPos;
}

// Now print out the table, padding entries with spaces to align them.
for (int i=0; i<myTable.size(); i++)
{
String record = (String)myTable.elementAt(i);
int decimalPos = record.indexOf('.');
while (decimalPos < maxLeftSideDigits) {
record = " " + record;
decimalPos++;
}

System.out.println(record);
}

[/code]

This might not be exactly correct, but I think it's close. Also, it might have strange side effects if you run it on a list of numbers with no decimal places (though I think it handles that correctly, too).

I hope this helps.

Kreitler

: Does anyone know how to align decimal points in a table in a console application? We havent learned the swing/gui stuff yet in Java but i want to make my output look nice anyway.
: [code]
: for example \$500.00
: \$0.00
:
: should look like this \$500.00
: \$ 0.00
: [/code]
: Thx for any suggestion you may have
: