decode binary to characters

[greg677]

Hey guys i just need a little help, i have created a java program to read binary from an external file eg, input.txt, and the notation is as follows 00000001 00000100 so all the binary is on one line separated by a space, now my program currently reads the binary values and prints them onto the screen, which is fine, the part which trouble me is decoding the binary to become a character, so the user can find out the "secret message". can anyone provide help with this. Thanks

[StormyWaters]

What exactly have you tried? Or are you having problems trying to figure out how to go about this?

[Eranga]

Which encoding you use, base64?

[greg677]

@ StormyWaters
Nope i am having problems trying to figure out the notation so the binary can be translated to ASCII

@ Eranga
01000001 01000010 01000011 00001010 01000100 01000101 01000110 00001010 00110000 00110001 00110010 00110011

for example this bit of binary is supposed to display
ABC
DEF
0123

so its binary to ASCII

[cselic]

for example lets use binary "10100011010010" thats is code for character "?".

first change it from String to Integer:
int code = Integer.parseInt("10100011010010",2);
second: cast it from Integer to Char:
System.out.println((char)code);


little program:

public class binaryToChar {
	public static void main(String[] args) {
		int code = Integer.parseInt("10100011010010",2);
		System.out.println((char)code);
	}
}

[Eranga]

Then, how you define the binary stream length?

[Eranga]

for example lets use binary "10100011010010" thats is code for character "?".

first change it from String to Integer:
int code = Integer.parseInt("10100011010010",2);
second: cast it from Integer to Char:
System.out.println((char)code);


little program:

public class binaryToChar {
	public static void main(String[] args) {
		int code = Integer.parseInt("10100011010010",2);
		System.out.println((char)code);
	}
}

Try following code segments, you found two things.

        int code = Integer.parseInt("10100011", 2);
        System.out.println((char) code);

        int code = Integer.parseInt("10100011010010", 2);
        System.out.println((char) code);

[cselic]

Try following code segments, you found two things.

Yes, you're right.
I fix it.

public class binaryToChar {
	public static void main(String[] args) {
		int code = Integer.decode("10100011");
		System.out.println((char)code);
	}
}

[Eranga]

That's much better. We'll see out thread starters' comment.

[greg677]

This solution works

public class binaryToChar {
	public static void main(String[] args) {
		int code = Integer.parseInt("10100011010010",2);
		System.out.println((char)code);
	}
}

however how can i get this program to convert binary numbers from a txt document? here an example document

[StormyWaters]

I suggest you first try to read a file. See if you can successfully read the file and print it out as is, then try to translate it.

Here's a Tutorial that will help:
Lesson: Basic I/O (The Java™ Tutorials > Essential Classes)

[Eranga]

Yeah, step down your problem first of all and solve them step by step. I think you get enough comments on conversion you want. If you go through them carefully it's possible to find the solution. So give a try from the first step and let us know if you stuck with any. Your effort make a real change lol.