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Integer reverseBytes() Method in Java

Last Updated : 7 Jul, 2018
The java.lang.Integer.reverseBytes(int a) is a built-in method which returns the value obtained by reversing the order of the bytes in the two's complement representation of the specified int value. Syntax : 
public static int reverseBytes(int a)
Parameter: The method takes one parameter a of integer type whose bytes are to be reversed. Return Value: The method will return the value obtained by reversing the bytes in the specified int value. Examples: 
Input: 75
Output: 1258291200
Explanation:
Consider an integer a = 75 
Binary Representation = 1001011
Number of one bit = 4 
After reversing the bytes we get = 1258291200

Input: -43
Output: -704643073
Below programs illustrate the java.lang.Integer.reverseBytes() method: Program 1: For a positive number.
Output: 
Integral Number = 61
After reversing the bytes we get = 1023410176
Program 2: For a negative number.
Output: 
Integral Number = -43
After reversing the bytes we get = -704643073
Program 3: For a decimal value and string. Note: It returns an error message when a decimal value and string is passed as an argument.
Output: 
prog.java:9: error: incompatible types: possible lossy conversion from double to int
 int a = 37.81;
 ^
prog.java:18: error: incompatible types: String cannot be converted to int
 a = "81";
 ^
2 errors
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