Some java wisdom you must know 1⃣ Use enum, not string constants - the compiler will catch mistakes. 2⃣ Don’t create new threads manually - use executors. 3⃣ Always close JDBC resources - or your DB will run out of connections. 4⃣ Don’t swallow checked exceptions - at least…


Compiler errors are far cheaper than production outages. Good practices prevent costly problems down the line.


every line is a lesson born from pain


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