Java shifts left and right, java shifts left and right

Java shifts left and right, java shifts left and right

I found a useful online compiler today and hope to share it with you.

In addition to java, there is also c ++..., the address is http://www.tutorialspoint.com/compile_java_online.php

 

In addition, I have reviewed the left and right shifts of java again today. Here is an example of negative numbers:

Positive and negative numbers are expressed in the form of complement in java.

For example,-2 indicates 11111111 11111111 11111111 in a computer.

 

1. Move left

-2 <2 that is,-2 shifted to the left. The result is: 11111111 11111111 11111111 11111000 (low position 0)

The above is the complement code. If the highest bit is 1, it indicates that this is a negative number. The complement code for a negative number is the original code of a positive number: "The highest bit is 1, the rest are reversed, and then 1 is added.

So let's look at it.-2 <2 actually indicates 10000000, 00000000, 00000000, 00001000 (-8)

 

2. Right Shift

If the high position is 1, then fill 1. If the high position is 0, then fill 0.

-2> 2: 11111111 11111111 11111111

10000000 00000000 00000000 00000001 (-1)

 

3. The shift operator can be used together with "="

A <= 2 indicates that the value after the Left shift of a is assigned to

 

4. Add: the java Virtual Machine shields large-end and small-end problems, and the internal is small-end.