java英文面試筆試題-展示頁
2025-04-13 02:07本頁面
【正文】 ct class? Answer: A class containing abstract method is called Abstract class. An Abstract class cant be instantiated. Example of Abstract class: abstract class testAbstractClass { protected String myString?！ ublic String getMyString() { return myString?！ Question: How to define an Interface? Answer: In Java Interface defines the methods but does not implement them. Interface can include constants. A class that implements the interfaces is bound to implement all the methods defined in Interface. Emaple of Interface: public interface sampleInterface { public void functionOne()?！ Question: Explain the user defined Exceptions? Answer: User defined Exceptions are the separate Exception classes defined by the user for specific purposed. An user defined can created by simply subclassing it to the Exception class. This allows custom exceptions to be generated (using throw) and caught in the same way as normal exceptions. Example: class myCustomException extends Exception { // The class simply has to exist to be an exception } Question: Explain the new Features of JDBC Core API? Answer: The JDBC API includes the plete JDBC API, which includes both core and Optional Package API, and provides inductrialstrength database puting capabilities. New Features in JDBC Core API: Scrollable result set
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