Java's displacement symbol

<< is the left symbol, column x<<1, is the content of X left one (the contents of x does not change) >> is the symbol bit of the right move symbol, X>>1 is the content of X to move to the right one, if the beginning is 1 to fill 1, is 0 responsibility to complement 0, ( The contents of x do not change). >>> is the right move without a sign bit, x>>>1 is the contents of X to the right one, the beginning of the 0 (x content does not change) the displacement operator can only be used for byte,short,char,int,long types. For operands below int type, the first is automatically converted to int and then offset, and the displacement can not be greater than 31, for the displacement system to do the first 32 of the model, the result is the real displacement, because the type of int is 4 bytes, that is 32 bits, moving 32 bits will have no meaning. For long is modulo 64.