/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.text.*;
 
/* 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
	{
		System.out.println(isNumeric("1,23"));
	}
 
	public static boolean isNumeric(String str)
	{
  		NumberFormat formatter = NumberFormat.getInstance();
  		ParsePosition pos = new ParsePosition(0);
  		formatter.parse(str, pos);
  		return str.length() == pos.getIndex();
	}
}

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