Converting data types

[bluekswing]

I'm trying to convert string representations of numbers that contain commas into integers.

For example, converting

80,000
125,000
8,000,000,000


from their string representation into an int data type.

I have an ugly brute force way of doing it by breaking up the "string" into individual characters, delete the commas and concantenate it all back together and then convert to int. It's ugly - anyone know of a better way, preferably a native method in java that will perform the conversion?

Thanks a bunch!

[gibsonrocker800]

Hey, i usually don't like handing out code, but i enjoyed doing this one.

Code:

import java.util.ArrayList;
public class Comma {
	public static void main(String[] args) {
		String num = "5,000,000";
		char[] chars = num.toCharArray();
		ArrayList<Character> charList = new ArrayList<Character>();
		for(int i = 0; i < chars.length; i++)
		{
			if((chars[i] + "").equals(","))
				continue;
			else
				charList.add(chars[i]);
		}
		for(char e : charList)
		{
			System.out.print(e);
		}
	}
}

If you are unfamiliar with arrays and ArrayLists and loops, then you should learn about them. You will be using them ALOT in programming.

[afsina]

there is an easier way of doing that.

long number = Long.parseLong(str.replaceAll(",",""));

[afsina]

Quote:

Originally Posted by gibsonrocker800

Hey, i usually don't like handing out code, but i enjoyed doing this one.

Code:

import java.util.ArrayList;
public class Comma {
	public static void main(String[] args) {
		String num = "5,000,000";
		char[] chars = num.toCharArray();
		ArrayList<Character> charList = new ArrayList<Character>();
		for(int i = 0; i < chars.length; i++)
		{
			if((chars[i] + "").equals(","))
				continue;
			else
				charList.add(chars[i]);
		}
		for(char e : charList)
		{
			System.out.print(e);
		}
	}
}

If you are unfamiliar with arrays and ArrayLists and loops, then you should learn about them. You will be using them ALOT in programming.

why not

Code:

for(int i = 0; i < num.length(); i++)
{
   if(num.charAt(i)!=','))
     charList.add(chars[i]);
}

still the overall approach is bad, but you should use the convenient ways.

[roots]

Code:

long number = Long.parseLong(str.replaceAll(",",""));

This is the best one ... . A roasted lamb ..