Can arraylist contain null values?
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Why Static variable required in java?For ex,class A { static int a; int b; } Why static is required?
The following program is Overloading or Overriding? public class PolymorphismEx { public int sampleMethod(int a) { return a; } public String sampleMethod(int a) { return "Is it Overloading or Overriding???"; } }
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Can we create an object if a class doesn't have any constructor ( not even the default provided by constructor ) ?
What are keywords give examples?
What is hasnext in java?
How many types of variables are there?
Can you call one constructor from another if a class has multiple constructors?
What does jenkins do?
How does finally block differ from finalize() method?
What an i/o filter?
What is assembly language?
What are the important features of Java 10 release?