convert 1 « byte « Java Data Type Q&A





1. Convert string to byte[]    stackoverflow.com

We try to convert from string to Byte[] using the following Java code:

String source = "0123456789";
byte[] byteArray = source.getBytes("UTF-16");
We get a byte array of length 22 bytes, we are not sure ...

2. how to convert hex to byte for the following program?    stackoverflow.com

public static String asHex (byte buf[]) {
    StringBuffer strbuf = new StringBuffer(buf.length * 2);
    int i;

    for (i = 0; i < ...

3. Converting UTF-8 to ISO-8859-1 in Java - how to keep it as single byte    stackoverflow.com

I am trying to convert a string encoded in java in UTF-8 to ISO-8859-1. Say for example, in the string 'âabcd' 'â' is represented in ISO-8859-1 as E2. In UTF-8 ...

4. Convert a single hex character to its byte value in java    stackoverflow.com

I have a single hexadecimal character, say

char c = 'A';
What's the proper way of converting that to its integer value
int value =??; 
assert(a == 10);
Doesn't matter really for now if ...

5. Convert a hex string to a byte in Java    stackoverflow.com

Let's say I have the string "1e". In Java, how can I convert it to the byte 0x1e?


I got both of the methods to work. However, then I found out that ...

6. Avoid creating 'new' String objects when converting a byte[] to String using a specific charset    stackoverflow.com

I'm reading from a binary file and want to convert the bytes to US ASCII strings. Is there any way to do this without calling new on String to avoid multiple ...

7. How do I convert a byte to a long in Java?    stackoverflow.com

I am reading 8 bytes of data in from a hardware device. I need to convert them into a numeric value. I think I want to convert them to ...

8. convert Class object to bytes    stackoverflow.com

If I have a Class instance at runtime, can I get its byte[] representation? The bytes I'm interested in would be in the Class file format, ...

9. Convert short to byte[] in Java    stackoverflow.com

How can I convert a short (2 bytes) to a byte array in Java, e.g.

short x = 233;
byte[] ret = new byte[2];

...
it should be something like this. But not sure.
((0xFF << ...





10. Converting long[64] to byte[512] in Java?    stackoverflow.com

I'm porting a process over to Java. There's already working versions in C# and C++. I have a section in C# that I do Marshal.Copy(...) to convert 64 ulongs to 512 bytes ...

11. Is this the best way to convert String hex to bytes?    stackoverflow.com

Is this the best way to convert String hex to bytes? Or can you think a shorter/simpler?

public static byte[] hexToBytes(String hex) {
return hexToBytes(hex.toCharArray());
}

public static byte[] hexToBytes(char[] hex) {
int length = hex.length / ...

12. Conversion of byte[] into a String and then back to a byte[]    stackoverflow.com

I am working on a proxy server. I am getting data in byte[] which I convert into a String to perform certain operations. Now when i convert this new String back ...

13. Converting raw bytes into audio sound    stackoverflow.com

In my application I inherit a javastreamingaudio class from the freeTTS package then bypass the write method which sends an array of bytes to the SourceDataLine for audio processing. Instead of ...

14. Java code To convert byte to Hexadecimal    stackoverflow.com

I have an array of bytes. I want each byte String of that array to be converted to its corresponding hexadecimal values. Is there any function in Java to convert a byte String ...

15. How to convert 24 byte bcd into ascii in java?    stackoverflow.com

I want to convert 24 byte BCD to ASCII.Im trying to write some code for this conversion but Im not sure how to do the math for it. Suggestions? This is my ...

16. AES Key encoded byte[] to String and back to byte[]    stackoverflow.com

In the similar question "Conversion of byte[] into a String and then back to a byte[]" is said to not to do the byte[] to String and back conversion, what ...





17. Hexadecimal string to byte conversion in java    stackoverflow.com

I have a hexadecimal string "41464353". I want to convert it into bytes. I know the value of this hex string in byte will be "65706783". I want this as answer. ...

18. convert from short to byte and viceversa in Java    stackoverflow.com

I'm trying to convert a short into 2 bytes...and then from those 2 bytes try to get the same short value. For that, I've written this code:


     ...

19. Convert ImageOutputStream to byte[]    stackoverflow.com

Have been trying to convert ImageOutputStream to byte[] for a while using JAI. Any inputs are appreciated. Thanks. Sorry here is the code snippet, I am working on. I had to post ...

20. Java: object to byte[] and byte[] to object converter (for Tokyo Cabinet)    stackoverflow.com

I need to convert objects to a byte[] to be stored in the Tokyo Cabinet key-value store. I also need to unbyte the byte[] to an Object when reading from the key-value ...

21. How to convert byte size into human readable format in java?    stackoverflow.com

How to convert byte size into human-readable format in Java? Like 1024 should become "1 Kb" and 1024*1024 should become "1 Mb". I am kind of sick of writing this utility method ...

22. A question regarding binary conversion to hex for signed bytes    stackoverflow.com

1) I understand that when you're converting binary to decimal the left most bit represents 0, 1...so on. So for example to convert 0001 to decimal it is 0*2^0+0*2^1+0*2^2+1*2^3 so the decimal ...

23. NumberFormatException while converting from string to byte    stackoverflow.com

I am coming across a strange thing. I have a number in binary in the form of string particularly "01001100". But I am getting the exception mentioned above by executing the ...

24. How do I convert Long to byte[] and back in java    stackoverflow.com

How do I convert a long to a byte[] and back in Java? I'm trying convert a long to a byte[] so that I will be able to send the byte[] over ...

25. how to convert fpf format to byte in java    stackoverflow.com

how to convert fpf[finger print format] format to byte in java

26. converting DataHandler to byte[]    stackoverflow.com

I need a code snippt for converting DataHandler to byte[]. This data handler contains Image.

27. Converting raw-byte values into Java types    stackoverflow.com

I have a problem with converting raw-bytes values into java types. I am receiving bytes by a datagram socket as a bytes array. I know exactly which bytes means what, but ...

28. Convert byte[] to String    stackoverflow.com

Is there an easy way to print byte[] array ( zeros and ones, basically to every bit convert in ascii '1' or ascii '0') to the console ?

29. Swig: convert return type std::string to java byte[]    stackoverflow.com

I have a C++ method that returns a std::string. I am using SWIG and I want to add logic to SWIG to make the std::string that is returned, be received in ...

30. Converting 2 longs to corresponding byte[], and combining with a delimeter in between    stackoverflow.com

I need to convert 2 longs to corresponding byte[], and then combine them with a delimeter in between. What is the most performant way to do this ? (I need to ...

31. Converted secret key into bytes, how to convert it back to secrect key?    stackoverflow.com

I convert the secretkey into bytes with following code

SecretKey key = KeyGenerator.getInstance("DES").generateKey();
byte[] bkey=key.getEncoded();
Now how do I get the key from bkey? I tried:
SecretKeySpec secretkey = new SecretKeySpec(bkey,"DES");   
SecretKeyFactory sfkey ...

32. Why converting String to byte arrary before send out?    stackoverflow.com

I am reading a java program, when it sending messages through socket, it aways convert String to byte array before sending out:

public static void write(String msg, OutputStream out)  {
  ...

33. Problem when converting bytes [] to string, then back to byte[]    stackoverflow.com

While trying to make a secured connection using AES and RSA I found that when I tried to convert the key to string for sending it over the network, then it ...

34. Need help converting a picture in byte in java    stackoverflow.com

Possible Duplicate:
how to convert image to byte array in java?
Hi, Can anybody help me convert a picture to byte array in java? thank you

35. How to convert hexadecimal byte to Unicode in Java    stackoverflow.com

I want to convert hexadecimal byte to Unicode. I have hex 0x80 in Windows-1250 and I want to convert to '\u0402'. Is it possible with standard methods without switch.

36. Convert individual POI SS Sheets to byte[] - Java    stackoverflow.com

I am developing an internal system that is intended to work very much like Google Docs. The main piece I am implementing mimics their web-based Spreadsheet implementation. For multiple reasons ...

37. Convert unsigned byte to signed byte    stackoverflow.com

Is there an easy and elegant way to convert an unsigned byte value to a signed byte value in java? For example, if all I have is the int value 240 ...

38. How do I convert byte[] to Bitmap?    stackoverflow.com

Let's say I have a byte buffer and how do I get Bitmap ? Thanks in advance.

39. Confusion about Java conversion of bytes to String for comparison of "byte order marks"    stackoverflow.com

I'm trying to recognize a BOM for UTF-8 when reading a file. Of course, Java files like to deal with 16 bit chars, and the BOM characters are eight bit bytes. My ...

40. how to convert string to byte in java?    stackoverflow.com

How to make string "01001000"(for example) to byte and convert it to string. Example : if string = "0110000101100010" then output must be "ab" because a == 01100001 and b == 01100010 ...

41. convert from floatbuffer to byte[]    stackoverflow.com

I'm trying to find a way to use jack-audio in java. I've managed to create wrapper based on jnajack to get audio from jacks' port to java app (the original jnajack ...

42. How to convert String into Byte and Back    stackoverflow.com

For converting a string, I am converting it into a byte as follows: byte[] nameByteArray = cityName.getBytes(); To convert back, I did: String retrievedString = new String(nameByteArray); which obviously doesn't work. How would ...

43. How to convert Java String to C++ String using bytes as the medium    stackoverflow.com

What would be the algorithm/implementation of the C++ code C++functionX in the following flow chart:

(JavaString) --getBytes--> (bytes) --C++functionX--> (C++String)
JavaString contents should match C++String contents as far as possible (preferably 100% for ...

44. On converting a Short to a Byte what goes on?    stackoverflow.com

I'm new to Java, from PHP, so spending some time/effort understanding types. Then I came across this:

    Byte bb = new Byte("127");
       ...

45. How can I get the RGB values of a 'TYPE_3BYTE_BGR' image?    stackoverflow.com

I have an image with TYPE_3BYTE_BGR and I want to convert it to a TYPE_INT_RGB. Though I have searched, I have not found a method to do this. I want to ...

46. How to convert a BufferImage to bytes    stackoverflow.com

How do I convert a BufferImage to bytes? I can't find useful help from JDK.

47. convert string to byte with 120 and higher value of string    stackoverflow.com

How do I convert String to byte with string having value more then 120. It may range till 255. So is there some method which let me do it? And also when ...

48. Converting to and from bytes in java    stackoverflow.com

I am having trouble understanding converting to and from bytes, or bytes in general

byte b = (byte)170;
System.out.println("Byte to int" + (int)b);
why is it that when I cast 170 to a byte ...

49. How can I convert a string containing the binary data pattern into bytes using java?    stackoverflow.com

I have to consume a web-service which is expecting a PDF file(base64binary data) as string. As the communication is done in XML UTF-8 encoding the string has many invalid elements, It ...

50. need to convert image to byte[]    coderanch.com

Hi there, This post is a continuation of a conversation from a previous post concerning images and xml My original query asked, "how do you move image data over a network using xml?" Image data is, of course, binary data. Therefore, I didn't even know if you could convert it somehow into character data to fit into an xml document, sent ...

51. Convert to bytes[]    coderanch.com

This should help: import java.nio.*; public class NumberUtil { public static byte[] getBytesFromShort(short value, boolean isNative) { if (isNative) return ByteBuffer.allocate(2).order(ByteOrder.nativeOrder()).putShort(value).array(); else return ByteBuffer.allocate(2).putShort(value).array(); } public static short getShortFromBytes(byte[] array, boolean isNative) { if (isNative) return ByteBuffer.wrap(array, 0, 2).order(ByteOrder.nativeOrder()).getShort(); else return ByteBuffer.wrap(array, 0, 2).getShort(); } public static byte[] getBytesFromInt(int value, boolean isNative) { if (isNative) return ByteBuffer.allocate(4).order(ByteOrder.nativeOrder()).putInt(value).array(); else return ByteBuffer.allocate(4).putInt(value).array(); } ...

52. Convert bytes into primitive types    coderanch.com

Hi guys, I Need to build an application which reads the constant pool from the class file. Problem is as follows : ClassFile { u4 magic; u2 minor_version; u2 major_version; u2 constant_pool_count; cp_info constant_pool[constant_pool_count-1]; u2 access_flags; u2 this_class; u2 super_class; u2 interfaces_count; u2 interfaces[interfaces_count]; u2 fields_count; field_info fields[fields_count]; u2 methods_count; method_info methods[methods_count]; u2 attributes_count; attribute_info attributes[attributes_count]; } u4 means 4 bytes ...

53. Type conversion between Bytes and Strings    coderanch.com

Why would the values printed at the bottom of the script be different? Also this works fine on some OS's but not on others??? String contentType = request.getContentType(); System.out.println("Content type is :: " +contentType); if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) { DataInputStream in = new DataInputStream(request.getInputStream()); int formDataLength = request.getContentLength(); byte dataBytes[] = new byte[formDataLength]; int byteRead = 0; ...

54. Byte to string Conversion    coderanch.com

hi I want to do the conversion of byte to string. I am getting only byte not the byte array. So i tried like this byte b = "bytevalue"; String str = Byte.toString(b); But the byte value is not at all converting to string. Again i tried like this byte[] b = new byte[1024]; for(int i=0;i

55. Conversion from Byte[] to string and Back    coderanch.com

Do you want your original String object back or do you just want to create a new String from your byte array ? If the former, then you need to maintain a reference to it. 'name' currently references it. Can you use that at the point where you want your String back ? If the latter, there are several String constructors ...

56. Conversion Long to byte[]    coderanch.com

Well thanks all for your input but the byteBuffer is not working for me lets say i have the code to convert a byte array into Long which is private long byte2Long(byte[] byteArray) { long l=0; int shift=0; for (int j=byteArray.length-1;j>=0;j--){ l+=(int)bytearray[j]&0xFF<<(8*shift); shift++; } } given a byte array with 4 bytes [0,0,71,-18] (it is always 4 byte) the function above ...

57. how to convert byte [] to String?    coderanch.com

thanks that does work. if I want an int out of the byte array do i need to convert it to String then to an Integer, then get the int value? is there a better way than this? byte [] buffer = new byte[4];//pretend there is valid data here String sIntValue = new String(buffer); Integer IValue = new Integer(sIntValue); int iValue ...

58. Byte Conversion    coderanch.com

59. Convert byte to string    coderanch.com

I have been working on this problem all day and just can't seem to get it to work. I have a program where I am inputing a character through an FTP connection. The character is located in the byte in[0]. I am trying to convert in[0] to a string using toString(). I have been able to get it to work using ...

60. cannot convert from long to byte    coderanch.com

61. Converting a long to byte[] and back again    coderanch.com

I have an assignment where I have to implement a simple TCP like protocol over an existing UDP implementation. I choose to use Java, but am having trouble manipulating bytes. I need to time stamp each packet. I am sending everything in the Datagram Packet as a byte[], but can't seem to convert a byte[] back to a long. Is there ...

62. converting byte[] to viewable video    coderanch.com

currently i am sending video from client to server and server to client in the form of a byte[], and once it gets to the client i need to write it to a file to then do a runtime.exec to view it in windows media player. the file is a wmv file, is it possible to view this byte[] in a ...

63. convert long to byte ?    coderanch.com

64. Convert byte[] to StringBuffer    coderanch.com

65. how to convert Byte to the String    coderanch.com

66. Conversion from String to Byte    coderanch.com

I have hexadecimal string "AAAA" I am mapping it to its binary equivalent string manually ( A=1010) and then converting the string to a byte array. The problem is that the contents of the byte array are not 1's and 0's but their ASCII equivalents (49 and 48). ( I have a structure to add two such byte arrays as 1's ...

67. How to convert from byte[] to string in form of 0x000000000    coderanch.com

Hi This is my first post, so if i correct a mistake (like putting this where it is not supposed to be) sorry beforehand. Im currently developing a service in a service bus that recieves mails and serialices attachments. The insertion to the database is done by another ESB service, which receives the query as part of an XML. the attachment ...

68. Convert byte[] to String    coderanch.com

Hi. How do I convert byte[] to String like 'AEUKHJBJKBJJKBKJBKBB...' ? I am trying to encrypt a file and it returns a byte[]. I want to write the encrypted content to a file to store it so I thought it would be best to write to some String like the above mentioned. How do I do so ?

69. Byte conversion to number    coderanch.com

I have a file I am reading in, in binary, and several fields are 24-bit, representing floating point numbers. For example: 0x300515 = 860.99000 Now, I need to flip the endianess of the number and convert to the number I can use. The byte value is in a byte array defined by byte[] frequency = {0x30, 0x05, 0x15, 0x00}; // 0x00 ...

70. Byte order conversion question    coderanch.com

I am trying to understand what is going on in the for loop below and how to get the byte array in the correct order. I am not concerned that I am putting a long into 4 bytes because the number will not get larger then 0x00FFFFFF. So, how do I get the bytes in the correct order and why do ...

71. Convert image to byte[] and viceversa    coderanch.com

I use this method to convert an image to an array of byte image = ImageIO.read(url); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageIO.write((RenderedImage)image, "png", baos); byte[] data = baos.toByteArray(); When I try to reconvert the byte array into an Image by this code PS: a is the byte array, y is an int array obtained by converting byte array like this int[] ...

72. demonstrate how to convert step by step 130 to fit in a byte variable    coderanch.com

someone, please, can demonstrate how the cast is made of the number 130 to fit into a variable of type byte? Step by step .... I try begin doing this: 130 / 2 = 65 Mod 0 65 / 2 = 32 Mod 1 32 / 2 = 16 Mod 0 16 / 2 = 8 Mod 0 8 / 2 ...

73. convert bytes[] to string for html    coderanch.com

hi experts, i upload html file into db as byte[] in blob column, and in another part i have to retrieve this file and display in textarea, i'm able to retrieve from db as bytes and convert it into string, but when display its shows as encrypt format, this is the struts application. this is my jsp ---------------

74. Perfect conversion for bytes to kilobytes conversion and back forth    coderanch.com

hi , I have a requirement where i need to convert bytes to kilobytes. I am doing this by dividing by data/1024. But when i am again assigning it back by * 1024.I am getting different value. Please suggest me a perfect way to convert bytes to kb and again reconvert the value back. thanks in advance.

75. Converting string to byte[]    java-forums.org

It just concatenate three byte array.here's the code: private static byte[] ConcatBytes(byte[] a1e, byte[] a2e, byte[] a3e) { byte concatenatedBytes[] = new byte[a1e.length + a2e.length + a3e.length]; for (int i=0; i

77. Byte to Timeticks conversion    forums.oracle.com

Hi, I have been testing some protocl level SNMP testing , in response to packet requests I am getting response in timeticks but the time ticks I am recvng are 4 bytes Byte-1 10 (0A Hex) Byte-2 102 (66 Hex) Byte-3 19 (13 Hex) Byte-4 104 (68 Hex) I need to convert it in time ticks can soem help me with ...

78. Converting a string to a byte    forums.oracle.com

The project I'm working on is a one-time pad cipher, and that bit was generated by a method given to me by the professor. I remember now that he mentioned in passing something about how in this case, the first bit is used as a "sign bit" and that a "1" represents negative.

79. Converting Long objects to bytes..PLease help    forums.oracle.com

I hava Long object I need to convert it to bytes, and store it in a byte array. I am aware of the ByteValue method however this method returns a byte = 8 bits the Long can be upto 64 bits, so how can i convert longs > 8 bits to bytes and store them in a byte array. thank you,,, ...

80. converting bytes to strings    forums.oracle.com

81. convert streem to bytes    forums.oracle.com

82. Converting unsigned to java signed byte value    forums.oracle.com

i need to use a raw address in a client i am writing but, of course, the address contains a byte outside of the java signed byte range. if any one could tell me what an unsigned byte of 224 is in signed java I would be very grateful, if you could also show how you did this it would be ...

83. Converting a String byte to byte    forums.oracle.com

84. Convert byte to String    forums.oracle.com

85. converting from into to byte    forums.oracle.com

class UnboxingError { public static void main(String[ ] args) { Integer iObj = 1000; // autobox the value 1000 int num = iObj.byteValue(); // manually unbox as byte !!! System.out.println(num); } } Output shown is -24.But I am unable to get that why the value -24 is shown. as the binary representation of 1000 is 1111101000 . So what is actually ...

86. Need help for converting String into byte[]    forums.oracle.com

Now my question is i have byte[] which i m reading from binary file. Next, i have to transfer that data to server using HttpClient which will transfer either as name value pair or as String & after this at server side i i have to display this string into byte[] again. This is whole issue.

87. Convert a byte into a byte[]    forums.oracle.com

88. how to convert string into byte[] so that object value    forums.oracle.com

Hello all, 1) i have byte[] which i read from binary file. which is like this bytes = [B@181d405 2) I use bytes.toString() for convert into String which is like this String ab = bytes.toString(); o/p for this is [B@181d405 3) Now my problem is i want to change this String into byte[] again & i want it's o/p as [B@181d405 ...

89. need to convert String to byte[]    forums.oracle.com

Hello all, 1) i have byte[] which i read from binary file. which is like this byte[] bytes = [B@181d405 2) I use bytes.toString() for convert into String which is like this String ab = bytes.toString(); o/p for this is [B@181d405 3) Now my problem is i want to change this String into byte[] again & i want it's o/p as ...

91. Converting bytes containing foreign language characters to String?    forums.oracle.com

Now I just have UTF-8 characters containing chinese/korean in the file, so it reads the english chars fine with UTF-8 encoding, but the asian characters still show up as ??????. The asian characters read fine in the txt file using notepad, and I'm no longer writing as binary, just using a normal write to file.

92. how to convert byte into string    forums.oracle.com

can any tell me how to convert byte into string when im an debugging thid code in eclipse it shows the result in integer format instead of string but in command prompt it is showing result in string format..........plz help package str; import java.io.*; public class Testfile { public static void main(String rags[]) { byte b[]=new byte[100]; try{ FileInputStream file=new FileInputStream("abc.txt"); ...

93. String conversion to byte[]    forums.oracle.com

Hi developers, I need to convert a very long String to a byte[] to perform compression with JDK 1.4. If I execute "myverylongString".getBytes(), every 532th byte in the resulting array will contain an unexpected character (something like 63 o 123). Now, I think that casting down chars to bytes is bad idea because of type width (16 vs 8 bytes) since ...

94. to convert string into bytes    forums.oracle.com

95. Convert HexString to Byte Problem    forums.oracle.com

1) Fix that dreadful exception handling. Since any exceptions thrown in your encrypt and decrypt methods represent systems errors they should be considered fatal and the program should probably terminate. To achieve this termination, just catch ALL exceptions rather than individual ones, wrap the resultant exception in an Error and throw that. 2) AES keys are 16, 24 or 32 bytes ...

97. Converting a byte to its respective Bytecode.    forums.oracle.com

Taking the idea of hash map forward, it would be a good idea if you save all the byte codes along with their values in some file (probably in csv, pipe delimited or tab delimited format). Then at the start of the program , you write a method to populate the hash map using that file (which is going to be ...

98. Byte to String conversion for encryption and decryption    forums.oracle.com

1) The "Jakarta Commons Codec" project has Base64 and Hex encoders that are well tested and well regarded. Google is your friend. 2) Since this is a new project, you should use AES rather than DESede. 3) The defaults when generating the Cipher object using Cipher cipher = Cipher.getInstance("DESede"); is for ECB block mode with PKCS5 padding. ECB is not a ...

99. converting byte [] to string    forums.oracle.com

also here is problem with display byte [] using println what ever the input is always it display same values. however initial and final values of the byte arrays are not matched. how can i solve this problem .....??????????? Edited by: jodhaaa on Nov 19, 2008 4:57 AM Edited by: jodhaaa on Nov 19, 2008 4:58 AM

100. how to convert report into bytes and how to convert bytes into report    forums.oracle.com

Dear all, If I am using Ireport or JasperReport, How can I convert the report into bytes and saved in the database? In next time, when I call the database and how can I convert bytes into report and show it? I know it is quite difficult and very less to use. It is just my study and in research. Appreciate ...