How I can in one method 《public void 》convert binary to decimal easy way in Java for beginners?

Question

Hi, i've started learn Java and have to write a Converter machine, which should convert binary to decimal etc. , but I haven't any idea what to do. Will appreciate all of your ideas ☺

Answer 1

Take input a binary value for example 10101
Equalent decimal is
=2^0*1+2^1*0+2^2*1+2^3*0+2^4*1
=1*1+2*0+4*1+8*0+16*1
=1+0+4+0+16
=21(decimal equalent)

Here, 2^0*1 is 2 power 0*(0th position bit 1)
So if 0th bit's corresponding value it obtains...

By a for or while loop you can done it from right most bit to left most bit..
Num%10 obtains right most bit.
Next number is num=num/10...

In this way you can generate a converter..

Hoping this helps you if you need to generate your own converter other than predefined one...

Edit:
see this
https://www.sololearn.com/learn/4401/?ref=app