| 1. Is unary (has a single operand)? |
| 2. Uses the ~ operator to "flip" (reverse) the bits within an integer value. If a bit is "on" it is turned "off". If a bit is "off" it is turned "on". |
| For example, |
| if byte a = 17; // Binary value: 0001 0001 Hex value: 11 byte b; after executing the statement b = (byte) ~a; |
| variable b will have a value of -18 (because 0001 0001 reverses to 1110 1110). Once again, the cast is needed in order to store the int value that results from the operation. |
| Example: |
| The following program can be run to test complement operations. | |
| import java.util.*; import java.io.*; public class Aman { public static void main(String[] args) { // Variable to be read from the user // Prompt for and read an integer value System.out.print("Integer: "); Scanner Keyboard=new Scanner(System.in); int number; number=Keyboard.nextInt(); // Display the result of complementing the number System.out.println(" ~" + number + " = " + ~number); } } |
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