On May 22, the California Secretary of State posted a list of declared write-in candidates for the June 2 primary. See it here.
There are eight Assembly districts in which only one person qualified to be on the primary ballot. Among them, no one filed as a write-in in the 4th, 8th, 22nd 0r 32nd districts. If anyone had filed as a write-in in any of those districts, and then received at least one write-in, that person would have been on the general election ballot.
In the 17th district in San Francisco, three write-ins filed, a Republican, a Libertarian, and a Peace & Freedom Party member. Whichever of these three gets the most write-ins will be on the November ballot.
In the 63rd district, a Peace & Freedom member is the only write-in, and he will be on the November ballot assuming he gets at least one write-in.
In the 54th and 61st districts, a Republican filed as a write-in.