Thread: Java.lang.NumberFormatException thrown

I am trying to write a program for converting positive binary inputs into hex.
Why am i getting this errors while compiling my binary to hex converter..

Exception in thread "main" java.lang.NumberFormatException: For input string: "148.0"
at java.lang.NumberFormatException.forInputString(Num berFormatException.java:65)
at java.lang.Long.parseLong(Long.java:441)
at BinToHex.convertbintohex(BinToHex.java:24)
at Test.main(Test.java:4)

Here is my BinToHex class

import java.io.*;
 
 
    public class BinToHex {
	    double tempDec,fractionpart;
	    long longofintpart,templongDec;
	    String inpu ="1001.01";
	    String hexOutput,intpart,tempDecString,hex = null;
 
	    static int i = 1;
 
	    public void convertbintohex() {
 
			if (inpu.contains(".")) {
				int placesAfterPoint = inpu.length() - inpu.indexOf(".") - 1;//every thing
				long numerator = Long.parseLong(inpu.replace(".", ""), 2);//goes 
				double decimalOfInput = ((double) numerator) / (1L << placesAfterPoint);//alright  till here 
 
 
				while (true) {
					tempDec = decimalOfInput * 16;
					if ((int)tempDec == tempDec) {
						tempDecString = String.valueOf(tempDec);
						templongDec = Long.parseLong(tempDecString, 10);
						hexOutput = Long.toHexString(templongDec);
 
						break;
					} else {
						intpart = String.valueOf((long)tempDec);
						longofintpart = Long.valueOf(intpart).longValue();
						if(i==1){
							hex=Long.toHexString(longofintpart);
							hexOutput = hex + ".";
							i=i+1;
						}else{
							hexOutput = hexOutput + hex;
						}
						fractionpart = tempDec-(int)tempDec;
						decimalOfInput = fractionpart;
					}
				}
			} else {
					// this part is ok
				tempDecString = String.valueOf(Integer.parseInt(inpu, 2));
				templongDec = Long.parseLong(tempDecString, 10);
				hexOutput = Long.toHexString(templongDec);
			}
			System.out.println(hexOutput);
	    }	
   }

and my Test class..

 public class Test{
	public static void main(String args[]){
		BinToHex i = new BinToHex();
		i.convertbintohex();	
	}
}

my first question
really need help