I am trying to make a Java binary translator, and I have gotten to the part of translating the binary back to a String. I have made it to a byte array. I want to convert it to a string.
For example, I want a new byte array of {01000001, 01100001, 01000010, 01100010} to return "AaBb".
How can I do this?
I think what you really want to do is convert a binary (decimal) number to its ASCII representation. If so, try something like this:
public class ByteArrayToAsciiChar {
public String byteToCharacter(byte b) {
return Character.valueOf((char)b).toString();
}
public static void main(String[] args) {
byte[] byteArray = {
0b00100101,
0b01000001,
0b01100001,
0b01000010,
0b01100010,
0b01010101
};
ByteArrayToAsciiChar testClass = new ByteArrayToAsciiChar();
for (byte b : byteArray) {
System.out.println("Byte: " + b + " ==> " + testClass.byteToCharacter(b));
}
}
}
Which gives this output:
Byte: 37 ==> %
Byte: 65 ==> A
Byte: 97 ==> a
Byte: 66 ==> B
Byte: 98 ==> b
Byte: 85 ==> U
HTH
Erm ... it is as simple as this:
byte[] bytes = {0b01000001, 0b01100001, 0b01000010, 0b01100010};
String str = new String(bytes, "ASCII");
Of course, that assumes that the bytes represent ASCII encoded characters. If not then use the name of the actual character encoding.
If you are going to do this a lot, then it is worth looking up the Charset object for the character set and using the String(byte[], Charset) overload.
If you already have a byte array (exemplarily constructed below), you can easily pass the byte array to a new String (as Ingo suggested) and viola - you're done.
byte b[] = new byte[4];
b[0] = Byte.parseByte("01000001", 2);
b[1] = Byte.parseByte("01100001", 2);
b[2] = Byte.parseByte("01000010", 2);
b[3] = Byte.parseByte("01100010", 2);
String output = new String(b);
If you only have an array of binarys in form of strings, you could use this:
public String convertBinaryArrayToString(String binary[]) {
String ret = null;
for (String i : binary) {
ret += (char) Byte.parseByte(i, 2);
}
return ret;
}
Hope this helps.
String(byte[] bytes, String charsetName)Constructs a new String by decoding the specified array of bytes using the specified charset.