write a program that will ask user to enter string, it should print valid if string start will alphabet and contain any digit in between, otherwise it should throw exception of invalid string. Also dry run your code. I need this in java

Q: Java used to be a hybrid implementation but thanks to JIT compilation, not anymore. True False

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Header files

A file with an extension that has some predefined declarations and definitions is called a header file. Every computer program imports a set of header files to perform common tasks such as getting input, displaying output, and so forth. Every language has different header files (such as C, JAVA, Python, and C++). In this article, header files are explained mainly in the context of the C/C++ language.