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i want to debug source code to learn write multiprocess program,but when i run this program use source code ,the ide tell me this exception:java.lang.NullPointerException: null.so i want to ask how to resolve this problem?follow is picture:
The text was updated successfully, but these errors were encountered:
i want to debug source code to learn write multiprocess program,but when i run this program use source code ,the ide tell me this exception:java.lang.NullPointerException: null.so i want to ask how to resolve this problem?follow is picture:
The text was updated successfully, but these errors were encountered: