Zaruthustran
The tingling means it’s working!
PHB p 215 "Some one-handed weapons are light enough for you to use in your off hand while holding another one-handed weapon in your other hand."
Since sword and javelin are one-handed weapons, you can't fight effectively if you're holding both of them. The rules are unclear on what that means, exactly. Likely, it means you can't attack with the javelin if you've got a sword in your main hand.
If he wanted to toss the javelin he could sheath the sword (minor), toss the javelin (standard), and draw the sword (move --> minor).
In my experience, running fighters, it's worthwhile to leave the sword sheathed and carry a javelin in-hand when traveling outdoors or any other area where encounters are likely to begin beyond move+charge range. You can throw a javelin *far*, and you're even likely to hit since it's Heavy Thrown and uses your Str mod on the attack. Then just draw your sword as a minor.
Since sword and javelin are one-handed weapons, you can't fight effectively if you're holding both of them. The rules are unclear on what that means, exactly. Likely, it means you can't attack with the javelin if you've got a sword in your main hand.
If he wanted to toss the javelin he could sheath the sword (minor), toss the javelin (standard), and draw the sword (move --> minor).
In my experience, running fighters, it's worthwhile to leave the sword sheathed and carry a javelin in-hand when traveling outdoors or any other area where encounters are likely to begin beyond move+charge range. You can throw a javelin *far*, and you're even likely to hit since it's Heavy Thrown and uses your Str mod on the attack. Then just draw your sword as a minor.