1 << i meaning in java code example

Example: >> and >>> operators in java

>> is a right shift operator shifts all of the bits in a value to the 
right to a specified number of times.
int a =15;
a= a >> 3;
The above line of code moves 15 three characters right.

>>> is an unsigned shift operator used to shift right. The places which 
were vacated by shift are filled with zeroes