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How to use java's Callable interface

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Release: 2023-04-19 09:58:05
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Explanation

1. The Callable interface can return results or throw exception tasks, and the implementer can define a call method without parameters.

2. Different from the run method of Thread and Runnable, the execution method of Callable task is call.

call() can return a value, but the run() method cannot.

call() can throw checked exceptions, such as ClassNotFoundException, but run() cannot throw checked exceptions.

Example

class MyCallable implements Callable<Integer>{
 
        MyCallable(){
 
        }
 
        @Override
        public Integer call() throws Exception {
            return 66;
        }
    }
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