https://introcs.cs.princeton.edu/java/11cheatsheet/
http://javadevnotes.com/java-double-to-string-examples
array copy
- System.arraycopy
hex string to byte array
- byte[] bytes = new java.math.BigInteger(hexText, 16).toByteArray();
byte array to hex string
- String hexText = new java.math.BigInteger(bytes).toString(16);
public static String toHexString(byte buf[]){
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
sb.append(Integer.toHexString(0x0100 + (buf[i] & 0x00FF)).substring(1));
}
return sb.toString();
}
byte to string
- String str2 = new String(buffers)
string to byte
- bytes[] buffers = str1.getBytes();