How can I solve “java.lang.NoClassDefFoundError”?

After you compile your code, you end up with .class files for each class in your program. These binary files are the bytecode that Java interprets to execute your program. The NoClassDefFoundError indicates that the classloader (in this case java.net.URLClassLoader), which is responsible for dynamically loading classes, cannot find the .class file for the class that you’re trying to use. Your code …

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What throws an IOException in Java?

Assume you were: Reading a network file and got disconnected. Reading a local file that was no longer available. Using some stream to read data and some other process closed the stream. Trying to read/write a file, but don’t have permission. Trying to write to a file, but disk space was no longer available. There …

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