링크 : http://docs.oracle.com/javase/tutorial/java/generics/wildcards.html 

VM 옵션을 준다.

-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=12345
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.authenticate=false 

위와 같이 하면은 12345 포트로 로그인된다.

링크 : http://visualvm.java.net/download.html 

링크 : http://viralpatel.net/blogs/getting-jvm-heap-size-used-memory-total-memory-using-java-runtime/

/**

* Class: TestMemory

* @author: Viral Patel

* @description: Prints JVM memory utilization statistics

*/

public class TestMemory {

     

    public static void main(String [] args) {

         

        int mb = 1024*1024;

         

        //Getting the runtime reference from system

        Runtime runtime = Runtime.getRuntime();

         

        System.out.println("##### Heap utilization statistics [MB] #####");

         

        //Print used memory

        System.out.println("Used Memory:"

            + (runtime.totalMemory() - runtime.freeMemory()) / mb);

 

        //Print free memory

        System.out.println("Free Memory:"

            + runtime.freeMemory() / mb);

         

        //Print total available memory

        System.out.println("Total Memory:" + runtime.totalMemory() / mb);

 

        //Print Maximum available memory

        System.out.println("Max Memory:" + runtime.maxMemory() / mb);

    }

}

링크 : http://aircook.tistory.com/69 

참고(Jeus ClassLoader) : http://testing.pe.kr/xe/index.php?mid=computer_01&listStyle=webzine&page=4&document_srl=333&sort_index=readed_count&order_type=asc 

* TPTP

참고 : http://antop.tistory.com/135

원격지 : http://antop.tistory.com/136

* yourkit

링크 : http://www.yourkit.com/download/index.jsp 

* jvmmonitor

링크 : http://code.google.com/a/eclipselabs.org/p/jvmmonitor/

Getting Start : http://www.jvmmonitor.org/doc/index.html#Getting_started 

* Netbeans Profiler

링크 : http://profiler.netbeans.org/download/prev/551.html 

링크 : http://blog.daum.net/onjsystems/274

링크 : http://msdn.microsoft.com/ko-kr/library/ms378422.aspx

JDK 1.4.2에서는 sqljdbc 1.2만 지원된다. ㅡㅡ;

sqljdbc2, 4는 JDK 1.5 이상에서 지원

sqljdbc-1.2.jar

sqljdbc2.jar

sqljdbc4.jar

링크 : http://blog.naver.com/PostView.nhn?blogId=galoa1123&logNo=120093241133&viewDate=¤tPage=1&listtype=0 

배열을 리스트로 바꾸기는 많이 해봤는데 뒤집어서 해보는건 못해봤다.

ArrayList<string> myList= new ArrayList<string>();

myList.add("테스트1");

myList.add("테스트2");

// List -> Array

String[] myArr = myList.toArray(new String[0]);

for(String s : myArr )

    System.out.println(s);

// Array -> List

List<String> myArr2  = Arrays.asList(myArr);

for (int i = 0; i < myArr2.size() ; i++) {

    System.put.pring(myArr2.get(i));

}

링크 : http://tangos.egloos.com/9483133 

홈페이지 : http://code.google.com/p/google-gson/ 

API        : http://google-gson.googlecode.com/svn/trunk/gson/docs/javadocs/index.html 

user guide : https://sites.google.com/site/gson/gson-user-guide