Crashs répétitifs

Bonjour, quand je lance minecraft, le jeu crash. Et dans les crashs reports j'ai :
---- Minecraft Crash Report ----
// There are four lights!

Time: 05/09/15 09:31
Description: Initializing game

java.lang.OutOfMemoryError: Initializing game
at sun.misc.Unsafe.allocateMemory(Native Method)
at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:127)
at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
at avd.c(SourceFile:37)
at bfd.<init>(SourceFile:37)
at bfg.<init>(SourceFile:18)
at bho.<init>(SourceFile:47)
at bfr.<init>(SourceFile:150)
at ave.am(SourceFile:461)
at ave.a(SourceFile:310)
at net.minecraft.client.main.Main.main(SourceFile:124)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at sun.misc.Unsafe.allocateMemory(Native Method)
at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:127)
at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
at avd.c(SourceFile:37)
at bfd.<init>(SourceFile:37)
at bfg.<init>(SourceFile:18)
at bho.<init>(SourceFile:47)
at bfr.<init>(SourceFile:150)
at ave.am(SourceFile:461)

-- Initialization --
Details:
Stacktrace:
at ave.a(SourceFile:310)
at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
Minecraft Version: 1.8.7
Operating System: Windows 8.1 (amd64) version 6.3
CPU: 2x Intel(R) Celeron(R) CPU 1005M @ 1.90GHz
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 34868832 bytes (33 MB) / 205795328 bytes (196 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.8.7
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics GL version 4.0.0 - Build 10.18.10.3282, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: Français (France)
Profiler Position: N/A (disabled)

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Si quelqu'un aurait la gentillesse de m'expliquer...