Apache Armony - Open Source Java SE

It's an open source java vm under Apache Licence v2 and includes all sources for different O.S. (Windows,Linux etc..etc...)

in riferimento a: Apache Harmony - Open Source Java Platform (visualizza su Google Sidewiki)

Open Source Bluetooth classes for Java

BlueCove try to become java standard for bluetooh application.

in riferimento a: BlueCove - BlueCove JSR-82 project (visualizza su Google Sidewiki)

HTML 5 new TAG

HTML evolution gives us two new tags for managing multimedia audio/video format on a web site.

in riferimento a: How HTML 5 Makes Using Audio and Video in Web Pages Easy (visualizza su Google Sidewiki)

Multi thead accessing via java


public class ThreadIDMain extends Object implements Runnable {
private ThreadID var;

public ThreadIDMain(ThreadID var) {
this.var = var;
}

public void run() {
try {
print("var.getThreadID()=" + var.getThreadID());
Thread.sleep(2000);
print("var.getThreadID()=" + var.getThreadID());
} catch (InterruptedException x) {
}
}

private static void print(String msg) {
String name = Thread.currentThread().getName();
System.out.println(name + ": " + msg);
}

public static void main(String[] args) {
ThreadID tid = new ThreadID();
ThreadIDMain shared = new ThreadIDMain(tid);

try {
Thread threadA = new Thread(shared, "threadA");
threadA.start();

Thread.sleep(500);

Thread threadB = new Thread(shared, "threadB");
threadB.start();

Thread.sleep(500);

Thread threadC = new Thread(shared, "threadC");
threadC.start();
} catch (InterruptedException x) {
}
}
}

class ThreadID extends ThreadLocal {
private int nextID;

public ThreadID() {
nextID = 10001;
}

private synchronized Integer getNewID() {
Integer id = new Integer(nextID);
nextID++;
return id;
}

// override ThreadLocal's version
protected Object initialValue() {
print("in initialValue()");
return getNewID();
}

public int getThreadID() {
Integer id = (Integer) get();
return id.intValue();
}

private static void print(String msg) {
String name = Thread.currentThread().getName();
System.out.println(name + ": " + msg);
}
}




in riferimento a: Thread ID : Thread Attributes « Threads « Java (visualizza su Google Sidewiki)

Retrieve java call Stack in 1.3 e 1.4+

Is possible to retrieve java callstack,
to determine which programm is calling from.

       Throwable e = new Throwable();
//       In java 1.4+
//        e.fillInStackTrace();
//        StackTraceElement[] elements = e.getStackTrace();
//        String callerClass=(elements.length > 1 ? elements[1].toString() : "(no caller)");
//       

        In java   1.3
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        e.printStackTrace(pw);
        String callerClass=sw.toString();
       

No SQL database using Groovy

Good tutorial by IBM

in riferimento a: Java development 2.0: NoSQL (visualizza su Google Sidewiki)

Web Workers

Web Workers
New online web 2.0 db