Java Language
- Getting started with Java Language
- Top 10 Java Errors with Solutions
- Awesome Book
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- 2D Graphics in Java
- Alternative Collections
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- Asserting
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- Class - Java Reflection
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- Date Class
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- EnumSet class
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- Functional Interfaces
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- Java Pitfalls - Exception usage
- Java Pitfalls - Language syntax
- Java Pitfalls - Nulls and NullPointerException
- Java Pitfalls - Performance Issues
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- Literals
- Boolean literals
- Character literals
- Decimal Integer literals
- Escape sequences in literals
- Floating-point literals
- Hexadecimal, Octal and Binary literals
- String literals
- The Null literal
- Using underscore to improve readability
- Local Inner Class
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- LocalTime
- log4j / log4j2
- Logging (java.util.logging)
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- Oracle Official Code Standard
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- Security & Cryptography
- SecurityManager
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- super keyword
- The Classpath
- The Java Command - 'java' and 'javaw'
- The java.util.Objects Class
- ThreadLocal
- TreeMap and TreeSet
- Type Conversion
- Unit Testing
- Using Other Scripting Languages in Java
- Using the static keyword
- Using ThreadPoolExecutor in MultiThreaded applications.
- Varargs (Variable Argument)
- Visibility (controlling access to members of a class)
- WeakHashMap
- XJC
- XML Parsing using the JAXP APIs
- XML XPath Evaluation
- XOM - XML Object Model
Java Language Literals Hexadecimal, Octal and Binary literals
Example
A hexadecimal number is a value in base-16.
There are 16 digits, 0-9 and the letters A-F (case does not matter).
A-F represent 10-16.
An octal number is a value in base-8, and uses the digits 0-7.
A binary number is a value in base-2, and uses the digits 0 and 1.
All of these numbers result in the same value, 110:
int dec = 110; // no prefix --> decimal literal
int bin = 0b1101110; // '0b' prefix --> binary literal
int oct = 0156; // '0' prefix --> octal literal
int hex = 0x6E; // '0x' prefix --> hexadecimal literal
Note that binary literal syntax was introduced in Java 7.
The octal literal can easily be a trap for semantic errors. If you define a leading '0' to your decimal literals you will get the wrong value:
int a = 0100; // Instead of 100, a == 64
