How do Bitwise Operators work?

Hi everybody
I know a little bit of bitwise operators and I am getting some problems working with them.
For example, imagine the byte 0x42 (Or 01000010). Now I want to build a long having this byte on the first position starting from the left so I try the following code:
long l = 0x42 << 56;However, this operation seems to work like if I have written:
long l = 0x42 << 24That is, the new long is a String of only 32 bits. Why does this command ignore the first 32 bits? Any ideas?

> On a small tangent, I asked this question yesterday:
what does this program output?
Guess, then copy and run to see if you were right.
public class PartyPretzel {
public static void main(String[] args) {
System.out.println(12345 + 5432ll);
Wauu. I would have bet my hand saying that the result will be 66666 and it is 17777. And the reason for this is....

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How do Shift Operators work?

Pls I am just beginning to write simple programs in java,
and would like to know how precisely shift operators
(e.g >> << >>>) work.
Thank you in anticipation.

I am a student, and have read my notes yet could not be
clear about the shift operators actually work (function).
Pls assist!Here's a start:
Compile and run the following line:System.out.println("33 << 4 == "+(33 << 4));which should print something like this:33 << 4 == 528Now, if you write down the binary representations of the numbers 33 and 528, you'll get: 33 == 00000000 00000000 00000000 00100001
528 == 00000000 00000000 00000010 00010000 Do you now see how the 4 is related to the operation?

Using bitwise operators

hi,
I'm new to java.. Still learning ....I hope some one would help me here ...
I wanted to check how bitwise operator works... tried all operators .. but the NOT operator seems to work in a different way ..could someone brief me ...
~2 -2
but the program gives a result -3.
pls explain how it works

It reverses all the bits in the number, that is: 0 becomes 1 and 1 becomes 0. And because the "two's complement"-rule defines negative numbers as "-x" = ~x + 1, you get ~x = -(x+1). 2 = 0000 0000 0000 0000 0000 0000 0000 0010
~2 = 1111 1111 1111 1111 1111 1111 1111 1101
= -(0000 0000 0000 0000 0000 0000 0000 0010 + 1)
= -3

Using bitwise operators to swap individual bits

I'm able to set or clear individual bits using masks, however I'm trying to figure out how I could go about swapping two bits using bitwise operators but I haven't been able to figure it out. For example, say I had int x = 37 which is 100101 in binary and I wanted to swap the 2nd and 3rd bits I'd like to get 100011 when I use Integer.toBinaryString(x) after performing some bitwise operations on x to swap bits around. Any suggestions ?

How about something like this? A preliminary test seemed to work.
class BitSwap2 {
public static void main(String[] argv) {
    int x = 37;
    System.out.printf("Binary: %s\n", Integer.toBinaryString(x));
    swapBits(x, 2, 3);
private static void swapBits(int x, int a, int b) {
    if(a == b) {
      System.out.printf("Nothing to swap.\n");
      return;
    int first = (x & (1<<(a-1)));
    int second = (x & (1<<(b-1)));
    // zero them out from the original so that we can swap them
    x ^= (first | second);
    if(a > b) {
      int diff = (a - b);
      x |= (first >> diff);
      x |= (second << diff);
    } else {
      int diff = (b - a);
      x |= (second >> diff);
      x |= (second << diff);
    System.out.printf("Binary: %s\n", Integer.toBinaryString(x));
}

Bitwise Operators .. stupid question ?

I have a HashMap which contains Strings.. The String are actually numbers.
I want to use Bitwise operators of and or, xor on them... How so I do it?
I want to say result = string1 and string2...... I am not sure how stupid this sounds... but I am sure I am too close to it....

Example answer to your original question, wanna:
Hashtable<Object, String> ht = new Hashtable<Object, String>();
ht.put("twenty eight", "28");
ht.put("five", "5");
ht.put("twenty", "20");
System.out.println(Integer.valueOf(ht.get("twenty eight")) & Integer.valueOf(ht.get("five")) & Integer.valueOf(ht.get("twenty")));Which, of course, prints "4" to standard out. You're best off using a Hashtable<Object, Integer>, though.
In answer to your second question,
~ is indeed the compliment operator. E.g:
System.out.println(1 + ", " + (~1));
prints "1, -2", as you might expect.

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How can I transfer work from one computer to another?

Welcome to the forum.
I can think of three basic ways to accomplish what you wish to do:
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Edit loosely, and Share to an AV file, which will be Imported into a New Project on that second computer. Or, edit VERY tightly, and do the same. I like the first, as removing, replacing Transitions, etc., can be much more difficult, unless that "tight edit" is 100% done.
Good luck,
Hunt
Message was edited by: Bill Hunt to correct formatting

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In my application export to csv open like a raw data in new tab.
But other browsers working great!.
Need to open in a csv file or save it as a csv file.
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Hi Adrian,
Why don't you try any another software for opening CSV files then Notepad ? According to my experience, you can use these softwares to open an CSV files and they are:-
Microsoft Excel
Open Office Calc
Google Docs
Also there is an additional tool available known as CSV viewer. You may try this, download it from here http://www.csvviewer.com/
I've never used Notepad for opening CSV files, because sometimes it contains some symbols which are not not at all compatibile with Notepad.
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

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How do Bitwise Operators work?

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