如何将字符串转换为字节？

Question

How can I convert a String containing number like "00110011" to bytes using Java? I have tried some code as follows-

System.Text.Encoding enc = System.Text.Encoding.ASCII; 
byte[] myByteArray = enc.GetBytes("a text string"); 
string myString = enc.GetString(myByteArray );

Answer 1

Try:

int num = Integer.parseInt("00110011", 2);
byte b = (byte)num;

Answer 2

Do you mean convert a binary number expressed as a string to an int?

If so, then:

String binaryString = "00110011";
int base = 2;
int decimal = Integer.parseInt(binaryString, base);

Answer 3

Try something like this

String str =  "00110011";
byte[] bytes = str.getBytes();

Alternatively you can send an Encoding to getBytes like "UTF-16", so str.getBytes("UTF-16")