Category: Programming

This battery save my apple magic mouse

When you change your mouse from logitech mouse to magic mouse, the first feeling is that magic mouse is much much heavier. This battery save my apple magic mouse, although it has lesser mah, but it is 5 times lighter than normal battery, so i much my magic mouse much lighter weight. And it is only…
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2015/09/08 0

hard to theme netbeans perfectly

It is hard to theme netbeans using traditional swing look & feel. The reason is netbean’s tab container is not traditional swing JTabbedPane. See the post https://netbeans.org/bugzilla/show_bug.cgi?id=150393 Netbeans use a AbstractViewTabDisplayerUI to support only few “default look & feel”, such as Metal, Nimbus, Aqua. see below: The problem is : This default look & feel tab container…
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2015/08/06 0

Peter-swing java look & feel

https://github.com/mcheung63/peter-swing


2015/08/03 0

grub is slow on bochs

if grub is running slowly on bochs, try to add “–no-rs-codes” to your grub-bios-setup command. It will be 0.5 sec versus 5 seconds different.


2015/08/02 0

binutils compile error

If you compiling binutils and have these error, just remove d-exp.c and try again. d-exp.c should be generated by d-exp.y but binutils makefile won’t delete it during “make distclean”


2015/05/03 0

compile dwarfdump in mac

CFLAGS=’-I /opt/local/include -L /opt/local/lib’ CXXFLAGS=’-I /opt/local/include -L /opt/local/lib’ ./configure –prefix=/peter-dwarfdump make make install Because mac gcc doesn’t search for the /opt/local, so need to specific the path manually.


2015/03/07 0

Thinkaholic open source event 2015/2/10

Thinkaholic open source event 2015/2/10


2015/02/15 0

Empty bochs instrument crash in linux, but not in mac

Empty bochs instrument crash in linux, but not in mac. My instrument code is nearly empty. core dump: configure: run by: bochsrcSDL.bxrc: instrument.h: instrument.cc:


2014/12/25 0

Java has bug again

Java has bug again. After you installed idk 1.8u25 in your mac, open Eclipse.app/Contents/MacOS/eclipse.ini, you will see: -vm /Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home But actually this line has no effect, when you run eclipse with -console -debug, you still see it is running use idk 1.6 “-vm /System/Library/Frameworks/JavaVM.framework”. To fix it, change that line to -vm /Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/bin/java Peter.


2014/12/22 0

volatile keyword is not everything to prevent compiler optimization

When you add the keyword “volatile” in front of variable declaration, it prevents compiler to optimize the line that are using that variable. But if the line is completely useless, compiler will still optimized it out, prevent to generate any byte code for it.


2014/12/10 0

${new} will cause error in old tomcat 7

Below code has error, because the ${new} will crash old tomcat 7. JSTL has bug.


2014/11/14 0

libelf.h has bug, it includes a missing header file

I cross compile the libel 0.8.13 on my ubuntu 12.04lts. I used the below command to configure it. The compile process is success and installed it correct. But inside the include/libelf/sys_elf.h, it includes a missing header file (elf.h). Just comment it out, and it will works.


2014/08/23 0

Mac has no mkfs.vfat

I have to package my kernel into a fat partition and load it up using grub, but mac doesn’t has a mkfs.vfat and “mount loopback” command. So I am creating a small programing using https://github.com/waldheinz/fat32-lib/ to manipulate the fat image by myself. So far these two small program can read & write a fat image: Read…
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2014/08/17 0

A little bit better – Showing the MBR

A little bit better – Showing the MBR Here is the java code to read MBR out:


2014/07/28 0

tightvnc java is very slow on Retina

Take a look line 170 from https://code.google.com/p/tightvncpanel/source/browse/trunk/src/main/java/com/glavsoft/viewer/swing/Surface.java This ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY); make g.drawImage(offscreenImage,0,0,null); runs very slow on Mac Retina. Solve: set the value to “VALUE_RENDER_SPEED” instead of  VALUE_RENDER_QUALITY  


2014/07/01 0

Optimize java startup speed

I spent lot of time to optimize the startup speed of my Java app from 10 seconds down to 6 seconds in my 2012 Mac air. I changed to MacBook 13″, the startup time become <=3. That proves the hard disk speed is the key to optimize the startup time. I am facing a new…
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2014/06/29 0

Connect Peter-file-system to linux or mac

After spent 3 days to play the FUSE and macFUSE, i finally connected Peter-file-system (https://code.google.com/p/pfsbuilder) to my mac/linux machine. It is quite simple and straightforward, I write a FUSE program that create a JVM and load my PFS stub (writhed in Java), every FUSE function calls will route to the stub and manipulates the PFS…
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2014/06/23 0

How to trace IIS error 500

The best way to trace IIS error 500 is to enable all log detail on screen, edit your web.config to


2014/06/19 0

newlib’s reentrant system calls will map to non-reentrant by default

newlib’s reentrant system calls will map to non-reentrant by default. The reentrant version of open() can be found in newlib-2.1.0/newlib/libc/reent/openr.c As you can see, it will call _open which is defined in newlib-2.1.0/newlib/libgloss/libnosys/open.c . So if you don’t write your reentrant functions, it will jump to non-reentrant by default. For OS developer want to implement…
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2014/05/04 0