Syntax: ">" and "<" operators in java

Question

I was taking a look to java java.lang.Integer class and I noticed much methods with ">" and "<" operators but I don't know what are.

For example the method Integer.signum(int i):

public static int signum(int i) {
    // HD, Section 2-7
    return (i >> 31) | (-i >>> 31);
}

Or Integer.rotateLeft(int i, int distance)

public static int rotateLeft(int i, int distance) {
    return (i << distance) | (i >>> -distance);
}

<< (left shift) and >> (right shift) – B001ᛦ Sep 13 '16 at 12:15 — B001ᛦ, Sep 13 '16 at 12:15
Ok, I've found what are bitshifts. Thanks! – Frankzt Sep 13 '16 at 12:20 — Frankzt, Sep 13 '16 at 12:20

Kesem David · Accepted Answer · 2016-09-13T12:22:06.407

0

These operators perform a bitshift to the number.

>> bithshift right

<< bitshift left

Further information here in the Bitwise Operators: section.

edited Sep 13 '16 at 12:22

answered Sep 13 '16 at 12:15

Kesem David

What is bitshift? – Frankzt Sep 13 '16 at 12:16
1

Shifting is taking the bits of a variable and shifting them to one of the sides asmany times as declared after the operator. – Kesem David Sep 13 '16 at 12:18
Having a `int` variable of lest say 5 which is represented as `00000101`, shifting it to the right once will produce `00000010` – Kesem David Sep 13 '16 at 12:19
Ok, thanks! I understand – Frankzt Sep 13 '16 at 12:20
Glad i could help, Please upvote and accept the answer, for the future lookers to come :) – Kesem David Sep 13 '16 at 12:21
Yes, I'm waiting to accept but for my reputation I can't upvote! – Frankzt Sep 13 '16 at 12:26
Thanks a lot, ill remind you again later if you forget , soon you'll be able to upvote too :) – Kesem David Sep 13 '16 at 12:27

score 0 · Answer 2 · edited May 23 '17 at 12:22

0

These are bit-shift operators.

More information in this page.

Essentially:

See this SO question for elaborations on what bit-shifting operations are, and how they modify numbers.

edited May 23 '17 at 12:22

Community

answered Sep 13 '16 at 12:15

Mena

score 0 · Answer 3 · answered Sep 13 '16 at 12:18

0

>> is arithmetic shift right, >>> is logical shift right and << shift left.
for more details go to Bitwise and Bit Shift Operators

answered Sep 13 '16 at 12:18

Abdelhak

3 Answers3