jdk1.6

As I understand jdk7 has the support for fork-and-join, Can I use fork-and-join in JDK6 without upgraging to JDK7.0? Yup, see here - the package you want is jsr166y. 来源： https://stackoverflow.com/questions/8205874/use-fork-and-join-in-jdk6

I have read that HttpURLConnection supports persistent connections, so that a connection can be reused for multiple requests. I tried it and the only way to send a second POST was by calling openConnection for a second time. Otherwise I got a IllegalStateException("Already connected"); I used the following: try{ URL url = new URL("http://someconection.com"); } catch(Exception e){} HttpURLConnection con = (HttpURLConnection) url.openConnection(); //set output, input etc //send POST //Receive response //Read whole response //close input stream con.disconnect();//have also tested commenting this

A customer of ours complains that, sporadically, calls of ours to FileChannel.map fail with a ClosedByInterruptException . The Javadoc does not list this as a legitimate possibility. Does anyone know what might be going on here? Cause0: java.nio.channels.ClosedByInterruptException Cause0-StackTrace: at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184) at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:772) Channel operations are bound to the thread doing the operations. If this thread is interrupted, the stream / channel is closed due to IO

I just noticed that JDK 6 has a different approach to setting a default TimeZone than JDK5. Previously the new default would be stored in a thread-local variable. With JDK6 (I just reviewed 1.6.0.18) the implementation has changed, so that if the user can write to the "user.timezone" property, or if there is no SecurityManager installed, the timezone changes VM-wide! Otherwise a thread-local change occurs. Am I wrong? This seems to be quite a drastic change, and I couldn't find anything on the web about it. Here is the JDK6 code: private static boolean hasPermission() { boolean hasPermission =

I am getting this error java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major version; class=map/CareMonths, offset=6 My Eclipse's Java compiler is set to 1.6 and my installed Java SDK in C:\Program Files is 1.6.0 , but still I get this error when I install my app to Webshere Application Server V7. What does offset=6 mean? I want to compile using Java 6 and Websphere 7 supports Java 6. I do see that the JDK in the IBM directory where server is installed is Java 7. Is that what is causing this? ....but again my workspace's Eclipse compiler is set to Java 1.6 . WebSphere Application