Change 1.0, 2.0 like float values to 1 , 2 | remove trailing zeros from floating binary point types

Assuming this is a matter of formatting a double value as a String, ensuring there are no trailing insignificant zeroes, I'd advise using a DecimalFormat to control the formatting. For example:

import java.text.*;
import java.util.*;

class Test {
    public static void main(String[] args) throws Exception {
        print(5.0d);
        print(5.000000001d);
        print(5.1d);
        print(123456789.1d);
        print(12345e-50);
    }

    private static void print(double value) {
        NumberFormat format = new DecimalFormat(
            "0.############",
            DecimalFormatSymbols.getInstance(Locale.US));
        String text = format.format(value);
        System.out.println(text);
    }
}

Note the use of Locale.US to always end up with a dot as the decimal separator.

The final example in main shows the limitations here - numbers very close to 0 will be formatted as "0", as I haven't provided enough optional digits (the # parts) to format them more appropriately. It's not clear what you want in those cases anyway though; the default representation would be 1.2345E-46.