adambard/learnxinyminutes-docs
1
1
Fork 0
mirror of https://github.com/adambard/learnxinyminutes-docs.git synced 2024-12-25 00:06:47 +03:00
Code Issues Projects Releases Wiki Activity

Merge pull request #2527 from adambard/byte-info

Browse Source 
Improve Java doc on bytes and chars
This commit is contained in:
Andrew Gallasch 2016-10-27 23:39:47 +10:30 committed by GitHub
commit 70617f16c4
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
java.html.markdown
View File

@ -95,6 +95,12 @@ public class LearnJava {
// Byte - 8-bit signed two's complement integer
// (-128 <= byte <= 127)
byte fooByte = 100;
// If you would like to interpret a byte as an unsigned integer
// then this simple operation can help
int unsignedIntLessThan256 = 0xff & fooByte;
// this contrasts a cast which can be negative.
int signedInt = (int) fooByte;
// Short - 16-bit signed two's complement integer
// (-32,768 <= short <= 32,767)
@ -110,7 +116,9 @@ public class LearnJava {
// L is used to denote that this variable value is of type Long;
// anything without is treated as integer by default.
// Note: Java has no unsigned types.
// Note: byte, short, int and long are signed. They can have positive and negative values.
// There are no unsigned variants.
// char, however, is 16-bit unsigned.
// Float - Single-precision 32-bit IEEE 754 Floating Point
// 2^-149 <= float <= (2-2^-23) * 2^127