Error: Could not find or load main class net.minecraft.client.main.Main

A moment ago I bought Minecraft, I installed and ran the game. And showed me the message: "Error: Could not find or load main class net.minecraft.client.main.Main
Java HotSpot (TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will be removed Likely in a future release."
I cannot play the game at all. I have no idea what I'm going to do. Please help.

Sorry for my english.