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Update java.html.markdown

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Andrew Gallasch 2016-10-27 23:38:44 +10:30 committed by GitHub
parent db47ffd5c9
commit e01c16e568
1 changed files with 9 additions and 1 deletions
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@ -96,6 +96,12 @@ public class LearnJava {
// (-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)
short fooShort = 10000;
@ -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