Comments by harishhn (Top 4 by date)

## A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xb7676998, pid=3425, tid=1828342592
#
# JRE version: Java(TM) SE Runtime Environment (7.0_45-b18) (build 1.7.0_45-b18)
# Java VM: Java HotSpot(TM) Server VM (24.45-b08 mixed mode linux-x86 )
# Problematic frame:
# C [libc.so.6+0x12c998] _IO_file_underflow+0x68
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread is native thread

siginfo:si_signo=SIGSEGV: si_errno=0, si_code=1 (SEGV_MAPERR), si_addr=0x00000037

Registers:
EAX=0x72112000, EBX=0xb76eeff4, ECX=0xffffffff, EDX=0x00001000
ESP=0x6cfa1ed0, EBP=0x72233b28, ESI=0x72239aa8, EDI=0x6cfa4b40
EIP=0xb7676998, EFLAGS=0x00010206, CR2=0x00000037

Top of Stack: (sp=0x6cfa1ed0)
0x6cfa1ed0: 72239aa8 72112000 00001000 ffffffff
0x6cfa1ee0: 72239aa8 b76eeff4 72239aa8 b75bd449
0x6cfa1ef0: 72239aa8 b75afc9a b76eeff4 b76eeff4
0x6cfa1f00: 72239aa8 6cfa4b40 72239aa8 b75bd260
0x6cfa1f10: 72239aa8 ffffffff 687ca559 687e9ff4
0x6cfa1f20: b76eeff4 b76eeff4 72239aa8 b75b3772
0x6cfa1f30: 72239aa8 687dffca 00000001 687e9ff4
0x6cfa1f40: 687e9ff4 72233378 00000002 687d3bc4

Instructions: (pc=0xb7676998)
0xb7676978: 4c 89 46 04 29 c2 89 46 0c 89 46 08 89 46 18 89
0xb7676988: 46 14 89 46 10 89 54 24 08 89 44 24 04 89 34 24
0xb7676998: ff 51 38 83 f8 00 7e 38 8b 56 40 01 46 08 83 fa
0xb76769a8: ff 74 05 01 d0 89 46 40 8b 46 04 0f b6 00 83 c4

Register to memory mapping:

EAX=0x72112000 is an unknown value
EBX=0xb76eeff4: <offset 0x1a4ff4=""> in /lib/i386-linux-gnu/libc.so.6 at 0xb754a000
ECX=0xffffffff is an unknown value
EDX=0x00001000 is an unknown value
ESP=0x6cfa1ed0 is an unknown value
EBP=0x72233b28 is an unknown value
ESI=0x72239aa8 is an unknown value
EDI=0x6cfa4b40 is an unknown value


Stack: [0x6cf24000,0x6cfa5000], sp=0x6cfa1ed0, free space=503k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libc.so.6+0x12c998] _IO_file_underflow+0x68


--------------- P R O C E S S ---------------

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
PSYoungGen total 18176K, used 11477K [0x9f180000, 0xa05c0000, 0xb3500000)
eden space 15616K, 73% used [0x9f180000,0x9fcb56c8,0xa00c0000)
from space 2560K, 0% used [0xa0340000,0xa0340000,0xa05c0000)
to space 2560K, 0% used [0xa00c0000,0xa00c0000,0xa0340000)
ParOldGen total 41216K, used 0K [0x76b00000, 0x79340000, 0x9f180000)
object space 41216K, 0% used [0x76b00000,0x76b00000,0x79340000)
PSPermGen total 16384K, used 6381K [0x72b00000, 0x73b00000, 0x76b00000)
object space 16384K, 38% used [0x72b00000,0x7313b420,0x73b00000)

Card table byte_map: [0x728fa000,0x72b00000] byte_map_base: 0x72564800

Polling page: 0xb7737000

Code Cache [0xb35db000, 0xb381b000, 0xb65db000)
total_blobs=249 nmethods=38 adapters=164 free_code_cache=48754Kb largest_free_block=49895232

Compilation events (10 events):
Event: 0.486 Thread 0x6f898800 nmethod 33 0xb363dec8 code [0xb363dfc0, 0xb363e250]
Event: 0.534 Thread 0x6f896800 34 sun.reflect.ClassFileAssembler::emitByte (11 bytes)
Event: 0.534 Thread 0x6f898800 35 sun.reflect.ByteVectorImpl::add (38 bytes)
Event: 0.535 Thread 0x6f898800 nmethod 35 0xb363d908 code [0xb363da00, 0xb363dabc]
Event: 0.535 Thread 0x6f896800 nmethod 34 0xb3639388 code [0xb36394a0, 0xb363959c]
Event: 0.536 Thread 0x6f898800 36 sun.reflect.ClassFileAssembler::emitConstantPoolUTF8 (50 bytes)
Event: 0.538 Thread 0x6f896800 37 ! sun.reflect.UTF8::encode (189 bytes)
Event: 0.561 Thread 0x6f896800 nmethod 37 0xb363f108 code [0xb363f220, 0xb363fa10]
Event: 0.561 Thread 0x6f896800 38 sun.reflect.UTF8::utf

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
this.removeNotify();
this.setUndecorated(true);
this.addNotify();
this.setSize(screenSize.width, screenSize.height);
this.setExtendedState(JFrame.MAXIMIZED_BOTH);
in ubuntu it showing task bar wit decorated window

i have done according to you but it showing same exception as like previous..