- , - . , ( ), . , . -, .
Java -. , , ( ) . , i1 I1 . , C/C++, , PASCAL, -.
Java , , . , NetBeans .
, . , - , , , . , . ( , ), . Java : int , float , boolean , Object () Java, .. (), .
a1 b1, MyType1, :
MyType1 a1,b1;
MyType1 .
j int:
int j;
. , int , MyType1 . , .
- . i1 i2:
int i1=5;
int i2=-78;
int i1=5,i2=-78;
int i1=i2=5;, C/C++, .
, = Java , , . , , , , . , , b = a , () b () a.
|
|
x=x+1
. , , x, 1 ( - x), x, .
:
=;
=;
1= 2;
. ,
i1=i2+5*i1;
, , .
, ( ) , , . , . , , . , C/C++/PASCAL, .
, , null. , , null. . , null. , , .
Java . : byte,short,int, long, char, float, double, () boolean -, enum ( enumeration ). Java .
Java :
( ). , int, float, boolean ..
() , , , . , Object, Float, Boolean, Collection, Runnable. , . , JButton, JTextField, JFormattedTextField, MyType .. , float Float, boolean Boolean Java !
, , . , i, j, object1. , : myVariable, jButton2, jTextField2.getText() ..
( ), _. , Double.MIN_VALUE, Double.MAX_VALUE, JOptionPane.INFORMATION_MESSAGE, MY_CHARS_COUNT ..
_ .
|
|
, . . . , , .
? , , . , . , . . .
Java . , , , . ( ), -, . .
1
ü Java , . ( ASCII), ( Unicode), , .
ü . 0x 0X, .
ü Java - , JavaScript HTML-, C++ - . Java - , , - C- .
ü Java , -. - , . Java- (JVM).
ü JIT- (Jast-In-Time) - , , . - .
ü Java:
(application) .
(applet) , WWW- .
(servlet) - , WWW
EJB (Enterprise JavaBeans) Java
Java
ü Java 1.0 1.1 Java 1. Java c 1.2 Java 2.
ü Java ( Java-) SDK (Software Development Kit) - . SDK:
Java ME Java Micro Edition, .
Java SE Java Standard Edition, .
Java EE Java Enterprise Edition, .
ü Java -. Java Unicode.
|
|
ü , , . \, . Unicode -\u, . , \u1234.
ü Java . . , .
ü - , , .. , , . Java .
ü , . , .
ü Java . , . - . null , .
:
- Java JavaScript, , JavaScript Java. .
- , Java (JRE).
- (applications) (applets).
- 0x O.
- , Java .
- , , ( , PASCAL FORTRAN).
16- 0, 1, 8, 15, 16, 255, 256.
, i1, i_1, 1i, i&1, i1234567891011, IJKLMN?
myObject, MyObject, myobject, Myobject, my object, my_object?