Geurney的专栏

Remote Method Interface:Client calls remote method on the stub. So the Client is like making a local call.The stub contacts the server, transfers information about the call and wait for a return f

多态性，继承。

Source -- Compile -- Bytecode -- Virtual Machine一个Hello World的例子：public class MyFirstApp { public static void main(String[] args) { System.out.println("Hello World!"); }}保存为MyFirstApp.java,

static, 运行顺序和访问权限

javac -d path *.javamanifest.txt:Main-Class: MyApp(empty line)jar -cvmf mainifest.txt app1.jar *.classjava -jar app1.jarPackages prevent class name conficts.Show the

Collections:A collection (container) is an object that groups multiple elements into a single unit.TreeSet: Keeps the elements sorted and prevents duplicates.Use red-black tree.HashSet: Prevents

A port represents a logical connection to a particular piece of software. A number representing an application.TCP port from 0 to 1023 are reserved for well known services.Client:Read data f

Save object to file: FileOutputStream fileStream = new FileOutputStream("output.out"); ObjectOutputStream os = new ObjectOutputStream(fileStream); os.writeObject(serilaziableObject); os.close()

GUIAnimation:x and y are coordinates.public class GUI { JFrame frame; JButton button; MyPanel myPanel; int x = 60; int y = 60; public GUI() { //Make a frame frame = new JFra

Immutability:String are immutable.Wrappers are immutable.Integer iWrap = new Integer(42);There is no setter method for a wrapper object.You can't change the value of String/Wrapper unless you

Stack and Heap:Stack: method invocations and local variables.Heap: all objects (instance variables inside), no matter the reference is a local or instance variable.Instance variables: declar

Exception:IOException, InterruptedException, RuntimeException(ClassCastException, NullPointerException)Compiler doesn't check runtime exception, which should be the logic problem in the code.Met

Extreme Programming (XP). Write the test code first.Develop in iteration cycles.prepcode: describe what to dotestcode: use prepcode to help designrealcode: use testcode to help design

Java 集合总结，Queue，Stack，List。