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Editorial Team
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Asked: 2026-05-17T17:41:53+00:00

I am working on an assignment and have to create two classes, one represents

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I am working on an assignment and have to create two classes, one represents a person, and the other representing a bridge. Only one person can be “crossing” the bridge at any one time, but there could be people waiting to cross

I easily implemented this with multi-threading allowing for multiple people to cross at once, but I am having issues when changing it to allow only one thread to run…

My main problem is the class design they want, I have to begin the threads within the person class, but the bridge class needs to be able to wait and notify them to start/stop

Any ideas how I can do this?

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1 Answer

  1. Editorial Team

    You probably want to read up on wait and notify. There are tutorials with a google search.

    But after you understand them a bit, you want to have the person objects call wait. Then you want the bridge object to call notify. When a person object returns from wait, it is their turn to cross (as I understand your problem.) When the person crosses, the bridge object would call notify again.

    Make sure you synchronize correctly. The tutorials should help.

    Read this question as well: How to use wait and notify in Java?

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