Java doesn’t require a constructor when we create a class . However, it’s important to know what happens under the hood when no constructors are explicitly defined. The compiler automatically provides a public no-argument constructor for any class without constructors. This is called the default constructor.
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The compiler-defined default constructor is required to do certain initialization of class internals . It will not touch the data members or plain old data types (aggregates like an array, structures, etc…). However, the compiler generates code for the default constructor based on the situation.9 Oca 2022
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