/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.text.NumberFormat;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		NumberFormat nf = NumberFormat.getInstance();
        nf.setMinimumFractionDigits(2);
        Double myVal = 4.0;
        Double myOtherVal = 4.15465454;
        System.out.println(nf.format(myVal));
        System.out.println(nf.format(myOtherVal));
	}
}

LyogcGFja2FnZSB3aGF0ZXZlcjsgLy8gZG9uJ3QgcGxhY2UgcGFja2FnZSBuYW1lISAqLwoKaW1wb3J0IGphdmEudXRpbC4qOwppbXBvcnQgamF2YS5sYW5nLio7CmltcG9ydCBqYXZhLmlvLio7CmltcG9ydCBqYXZhLnRleHQuTnVtYmVyRm9ybWF0OwoKLyogTmFtZSBvZiB0aGUgY2xhc3MgaGFzIHRvIGJlICJNYWluIiBvbmx5IGlmIHRoZSBjbGFzcyBpcyBwdWJsaWMuICovCmNsYXNzIElkZW9uZQp7CglwdWJsaWMgc3RhdGljIHZvaWQgbWFpbiAoU3RyaW5nW10gYXJncykgdGhyb3dzIGphdmEubGFuZy5FeGNlcHRpb24KCXsKCQlOdW1iZXJGb3JtYXQgbmYgPSBOdW1iZXJGb3JtYXQuZ2V0SW5zdGFuY2UoKTsKICAgICAgICBuZi5zZXRNaW5pbXVtRnJhY3Rpb25EaWdpdHMoMik7CiAgICAgICAgRG91YmxlIG15VmFsID0gNC4wOwogICAgICAgIERvdWJsZSBteU90aGVyVmFsID0gNC4xNTQ2NTQ1NDsKICAgICAgICBTeXN0ZW0ub3V0LnByaW50bG4obmYuZm9ybWF0KG15VmFsKSk7CiAgICAgICAgU3lzdGVtLm91dC5wcmludGxuKG5mLmZvcm1hdChteU90aGVyVmFsKSk7Cgl9Cn0=