Java Bits Shift on Unsigned Integer [closed]

Question

Closed. This question needs details or clarity. It is not currently accepting answers.

Want to improve this question? As written, this question is lacking some of the information it needs to be answered. If the author adds details in comments, consider editing them into the question. Once there's sufficient detail to answer, vote to reopen the question.

Closed 10 years ago.

Improve this question

I understand that java has no unsigned int, however as of Java SE 8, there are methods to use integer datatype to perform unsigned arithmetic. How do I go about doing bits shift to "unsigned int" in java?

possible duplicate of How to use the unsigned integer in java 8? — Keegan
– Keegan, Commented May 15, 2015 at 15:19

Alex Salauyou · Accepted Answer · 2015-05-15 16:10:30Z

2

You do all bitwise operations the same way you do them for signed int, using >>> to shift right. "Unsigned" features serve just for outputting and converting, they don't affect inner bit representation.

For example:

int i = Integer.MAX_VALUE / 1024 - 1023;
System.out.println(Integer.toUnsignedString(i) + "=" + Integer.toBinaryString(i));
i = i >>> 10;
System.out.println(Integer.toUnsignedString(i) + "=" + Integer.toBinaryString(i));
i = i << 21;
System.out.println(Integer.toUnsignedString(i) + "=" + Integer.toBinaryString(i));

resulting output:

2096128=111111111110000000000                // 11 ones, 10 zeros
2047=11111111111                             // 11 ones, 0 zeros
4292870144=11111111111000000000000000000000  // 11 ones, 21 zeros

edited May 15, 2015 at 16:10

answered May 15, 2015 at 16:04

Alex Salauyou

14.4k5 gold badges48 silver badges70 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Java Bits Shift on Unsigned Integer [closed]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related