Shift operators

[Harsha Jay]

-31>>>5>>5>>>5>>5>>>5>>5
This will give a 3 as result.
-31 will be 30 when inverted and sign taken off and now moved right 30 times.
I do not understand how we still end up as 30
Could some one come up with a step by step explanation.
Would appreciate it greatly
Thanks

[Valentin Crettaz]

this will be evaluated from left to right i.e.
(((((-31>>>5)>>5)>>>5)>>5)>>>5)>>5
-31 = 11111111111111111111111111100001
Now,
-31 >>> 5 = 00000111111111111111111111111111
00000111111111111111111111111111 >> 5 = 00000000001111111111111111111111
00000000001111111111111111111111 >>> 5 = 00000000000000011111111111111111
00000000000000011111111111111111 >> 5 = 00000000000000000000111111111111
00000000000000000000111111111111 >>> 5 = 00000000000000000000000001111111
00000000000000000000000001111111 >> 5 = 00000000000000000000000000000011
which is equivalent to 3 !
HIH
Val
[This message has been edited by Valentin Crettaz (edited September 24, 2001).]

[Harsha Jay]

Thank you very much
but is there a method i can call in the program to get the internal representation of the int. I'm sure i saw it somewhere.

[Valentin Crettaz]

you mean the binary representation of an int ?
Integer.toBinaryString("-31");
returns
11111111111111111111111111100001
Val

[Jane Griscti]

harsh,
Please read the JavaRanch Name Policy and re-register using a name that complies with the rules.
Thanks for your cooperation.
------------------
Jane Griscti
Sun Certified Programmer for the Java� 2 Platform