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=====Java=====

{{:user:afassett:start:bilingual:java_logo.gif?nolink&200|}}
====Template===
<cli>  class //fileName// {
    public static void main(String[] args) {
       //Code//
    }
  }
</cli>
===Examples===
<cli>  class HelloWorldApp {
    public static void main(String[] args) {
        System.out.println("Hello World!"); // Display the string.
    }
  }
</cli>
==Jwindow==
http://www.beginner-java-tutorial.com/jwindow.html
===Tutorials===
[[http://download.oracle.com/javase/tutorial/|Java main]]\\
invoking a method or calling a method is followed by a period. Than argument(s). Assignment operator is an instruction to set the value of the variable on the left-hand side of the equal sign. Java program into a language called byte-code. Byte-code is the machine language for a fictitious computer called the __Java virtual machine__. Name of a variable is called an **identifier**. Java identifier must not start with digit and all the characters must be letters, digits or underscore symbol. "$" is allowed but is reserved for special purposes. **Java is case sensitive.**. When one or more variables are declared on the same line they are separated by a comma.\\
**Primitive types**\\
 |Type Name|Kind of Value| Memory Used | Size Range|\\
 | Boolean |true or false| 1 byte | not applicable |\\
 | char | single character | 2 byte | all Unicode chars |\\
 | byte | integer | 1 byte |  -128 to 127 |\\
 | short | integer | 2 byte | 237868 to 32767 |\\
 | int | integer | 4 bytes | -2147483648 to 2147483647 |\\
 | long | integer | 8 bytes | - 9223372036854775808 to 9223372036854775808 |\\
 | float | floating-point # | 4 bytes | +/-3.40282347x10^38 to +/-1.40239846x10^45 |\\
 | double | floating-point # | 8 bytes |  ?  |\\

----
A variable that has been declared but that has not yet been given a value by some means, such as an assignment statement is said to be uninitialized. Rule of thumb not to store a value of one type into an variable of another type. Some special cases where it is permitted (int to double).\\
generally you can assign a value of any type in the following list to a variable of any type that appears further down in the list.\\
                byte->short->int->long->float->double\\
As you move father down the list the range gets large. A int can be a long, float, and double but not a short or byte. char to a in or any of the numeric type that follow int can cast.\\
*pages22-23.\\


===References===
[[http://download.oracle.com/javase/6/docs/api/|docs]]\\
Absolute Java\\
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