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Java Reflection
What is reflection and its use in java?
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What value does read() return when it has reached the end of a file
The read() method returns -1 when it has reached the end of a file.
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What is the difference between a Window and a Frame
The Frame class extends Window to define a main application window that can have amenu bar.
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Is the following Java program run? private static void main(String args[]) { class valan { //body of the class } }
No. Compilation error will occur.The error message is : main method should be public
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What is synchronization and why is it important
With respect to multithreading, synchronization is the capability to control the access ofmultiple threads to shared resources. Without synchronization, it is possible for onethread to modify a shared object while another thread is in the process of using orupdating that object's value. This often leads to significant errors.
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Java Class object size
What would be the object size of class without a member ( i.e. no method and no variable) is created?Explanation : For sure, Object size will not zero as we print the object on console, hash code get printed, the object has existence in memory.
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What is the Collections API
The Collections API is a set of classes and interfaces that support operations oncollections of objects.
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How to connect Java with Microsoft Excel?
I want to read and write data from excel sheet
Java Interview Questions
Ans