I always played on 1.8.3. I wanted to test out the snapshots but the launcher crashes every time I hit 'Play'. Then I tried 1.8.8 and it didn't work either. But 1.8.3 and lower works perfectly. I even updated java but it still doesn't work.

That was the game output:

[13:18:56] [Client thread/INFO]: Setting user: cpmct32
[13:18:56] [Client thread/INFO]: (Session ID is token:8304cad064644c8bab1cbd49974b89fd:f74078da5b604351aa6849af46b38544)
Exception in thread "Client thread" java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:213)
at com.google.common.collect.Lists$ReverseList.<init>(Lists.java:767)
at com.google.common.collect.Lists.reverse(Lists.java:759)
at lt.b(SourceFile:156)
at lt.<init>(SourceFile:43)
at net.minecraft.server.MinecraftServer.<init>(SourceFile:155)
at bpo.<init>(SourceFile:41)
at ave.<init>(SourceFile:293)
at net.minecraft.client.main.Main.main(SourceFile:124)
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release