Why Java doesn't support <<< operator

Java adds the operator ">>>" to perform logical right shifts, but because the logical and arithmetic left-shift operations are identical, there is no "<<<" operator in Java.

from Shifts in Java...

Why doesn't Java support the <<< (unsigned left shift) operator, but does support the >>> (unsigned right shift) operator?

Because a (hypothetical) unsigned left shift operator would do exactly the same thing as the existing left shift operator.

(Hint: multiplying a binary integer by 2 entails left shifting by 1 and making the rightmost bit zero whether the integer representation is signed or unsigned. Write some examples on a piece of paper and test it for yourself.)

Why doesn't Java support the <<< (unsigned left shift) operator, but does support the >>> (unsigned right shift) operator?

That is because when you left shift the bits , the leftmost bit (AKA SIGNED Bit) is lost anyways.

Since unsigned left shift operator would do exactly the same thing as the existing left shift operator, we don't have it.