Problem with Populating an ArrayList of Floats

[Rob Sweeny]

Hi All,

How do I populate an ArrayList of Floats?
The below code gives me errors on compilation.

import java.io.*;
import java.util.ArrayList;

public class LegalKeeperFish {
	public static void main(String[] args) {
		ArrayList<Float> fishLengthList = new ArrayList<Float>();
		fishLengthList.add(10.0);
		fishLengthList.add(15.5);
		fishLengthList.add(18.0);
		fishLengthList.add(29.5);
		fishLengthList.add(45.5);
		
		for (float length: fishLengthList) {
			if (length >=28) {
				System.out.println("Keeper Fish Length : " + length);
			}
		}
	}
}

c:\code>javac LegalKeeperFish.java
LegalKeeperFish.java:7: cannot find symbol
symbol : method add(double)
location: class java.util.ArrayList<java.lang.Float>
___________ fishLengthList.add(10.0);
______________________^

Thanks

p.s. Is this the correct forum for a question like this?

[W. Joe Smith]

Try declaring all your numbers like this:

fishLengthList.add(10.0f);


Putting an f after the number makes it a float, as opposed to a double.

[John de Michele]

Rob:

You've got your ArrayList set up correctly. The problem with your code is that floating point numbers default to doubles unless you mark them as floats. So, if you want Java to know you mean floats rather than doubles, you'll need to add an 'f' to the number, like this: 23.05f.

John.