User Datagram Protocol
Study of Connection-less approach using datagram-approach (UDP)
Showing posts with label JAVA TUTORIAL. Show all posts
Showing posts with label JAVA TUTORIAL. Show all posts
Sunday, 5 February 2017
Sunday, 16 October 2016
Monday, 16 May 2011
JAVA Language Fundamentals
The Java programming language has includes five simple arithmetic operators like are + (addition), - (subtraction), * (multiplication), / (division), and % (modulo). The following table summarizes them:
2. Importing packages doesn't recursively import sub-packages.
3. Sub-packages are really different packages, happen to live within an enclosing package. Classes in sub-packages cannot access classes in enclosing package with default access.
4. Comments can appear anywhere. Can't be nested. No matter what type of comments.
5. At most one public class definition per file. This class name should match the file name. If there are more than one public class definitions, compiler will accept the class with the file's name and give an error at the line where the other class is defined.
6. It's not required having a public class definition in a file. Strange, but true. J In this case, the file's name should be different from the names of classes and interfaces (not public obviously).
7. Even an empty file is a valid source file.
8. An identifier must begin with a letter, dollar sign ($) or underscore (_). Subsequent characters may be letters, $, _ or digits.
9. An identifier cannot have a name of a Java keyword. Embedded keywords are OK. true, false and null are literals (not keywords), but they can't be used as identifiers as well.
10. const and goto are reserved words, but not used.
11. Unicode characters can appear anywhere in the source code. The following code is valid.
4. Comments can appear anywhere. Can't be nested. No matter what type of comments.
5. At most one public class definition per file. This class name should match the file name. If there are more than one public class definitions, compiler will accept the class with the file's name and give an error at the line where the other class is defined.
6. It's not required having a public class definition in a file. Strange, but true. J In this case, the file's name should be different from the names of classes and interfaces (not public obviously).
7. Even an empty file is a valid source file.
8. An identifier must begin with a letter, dollar sign ($) or underscore (_). Subsequent characters may be letters, $, _ or digits.
9. An identifier cannot have a name of a Java keyword. Embedded keywords are OK. true, false and null are literals (not keywords), but they can't be used as identifiers as well.
10. const and goto are reserved words, but not used.
11. Unicode characters can appear anywhere in the source code. The following code is valid.
Operators and assignments
The Java programming language has included five simple arithmetic operators like + (addition), - (subtraction), * (multiplication), / (division), % (Modulus)
1. Unary operators
1.1 Increment and Decrement operators ++ --
We have postfix and prefix notation. In post-fix notation value of the variable/expression is modified after the value is taken for the execution of statement. In prefix notation, value of the variable/expression is modified before the value is taken for the execution of statement.
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