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I made my class Cloneable but I still get 'Can't access protected method clone. Why?
I made my class Cloneable but I still get 'Can't access protected method clone. Why? Yeah, some of the Java books, in particular "The Java Programming Language", imply that all you have to do in order to have your class support clone() is implement the Cloneable interface. Not so. Perhaps that was t... 2013-02-07, 2356👍, 0💬

What are Access Specifiers available in Java?
What are Access Specifiers available in Java? ccess specifiers are keywords that determines the type of access to the member of a class. These are: Public Protected Private Defaults 2013-03-04, 2355👍, 0💬

What is the purpose of a statement block?
What is the purpose of a statement block? A statement block is used to organize a sequence of statements as a single statement group. 2013-01-24, 2355👍, 0💬

What interface must an object implement before it can be written to a stream as an object?
What interface must an object implement before it can be written to a stream as an object? An object must implement the Serializable or Externalizable interface before it can be written to a stream as an object. 2013-01-10, 2353👍, 0💬

Can an Interface have an inner class?
Can an Interface have an inner class? Yes public interface abc { static int i=0; void dd(); class a1 { a1() { int j; System.out.println("in interfia"); }; public static void main(String a1[]) { System.out.println("in interfia"); } } } 2013-02-04, 2351👍, 0💬

What is JIT?
What is JIT? JIT stands for Just In Time compiler. It compiles java byte code to native code. 2013-03-13, 2350👍, 0💬

When you serialize an object, what happens to the object references included in the object?
When you serialize an object, what happens to the object references included in the object? The serialization mechanism generates an object graph for serialization. Thus it determines whether the included object references are serializable or not. This is a recursive process. Thus when an object is ... 2013-05-22, 2348👍, 0💬

What are the high-level thread states?
What are the high-level thread states? The high-level thread states are ready, running, waiting, and dead. 2012-11-02, 2348👍, 0💬

What is HashMap and Map?
What is HashMap and Map? Map is Interface and Hashmap is class that implements that. 2013-04-25, 2347👍, 0💬

If a method is declared as protected, where may the method be accessed?
If a method is declared as protected, where may the method be accessed? A protected method may only be accessed by classes or interfaces of the same package or by subclasses of the class in which it is declared. 2012-12-18, 2347👍, 0💬

How do you enable the concurrent garbage collector on Sun's JVM?
How do you enable the concurrent garbage collector on Sun's JVM? -Xconcgc options allows us to use concurrent garbage collector (1.2.2_07+)we can also use -XX:+UseConcMarkSweepGC which is available beginning with J2SE 1.4.1. 2013-03-28, 2345👍, 0💬

How does an exception permeate through the code?
How does an exception permeate through the code? An unhandled exception moves up the method stack in search of a matching When an exception is thrown from a code which is wrapped in a try block followed by one or more catch blocks, a search is made for matching catch block. If a matching type is fou... 2013-05-31, 2343👍, 0💬

Can an exception be rethrown?
Can an exception be rethrown? Yes, an exception can be rethrown. 2012-12-13, 2343👍, 0💬

When to Use the Throughput Collector?
When to Use the Throughput Collector? Use the throughput collector when you want to improve the performance of your application with larger numbers of processors. In the default collector garbage collection is done by one thread, and therefore garbage collection adds to the serial execution time of ... 2013-03-25, 2341👍, 0💬

Why Thread is faster compare to process?
Why Thread is faster compare to process? A thread is never faster than a process. If you run a thread(say there's a process which has spawned only one thread) in one JVM and a process in another and that both of them require same resources then both of them would take same time to execute. But, when... 2013-03-21, 2341👍, 0💬

What is JVM?
What is JVM? JVM stands for Java Virtual Machine. It is the run time for java programs. All are java programs are running inside this JVM only. It converts java byte code to OS specific commands. In addition to governing the execution of an application's byte codes, the virtual machine handles relat... 2013-03-13, 2341👍, 0💬

Why are the methods of the Math class static?
Why are the methods of the Math class static? So they can be invoked as if they are a mathematical code library. 2012-12-28, 2341👍, 0💬

Name the eight primitive Java types.
Name the eight primitive Java types. The eight primitive types are byte, char, short, int, long, float, double, and boolean. 2012-11-29, 2341👍, 0💬

Can an unreachable object become reachable again?
Can an unreachable object become reachable again? An unreachable object may become reachable again. This can happen when the object's finalize() method is invoked and the object performs an operation which causes it to become accessible to reachable objects. 2013-06-17, 2340👍, 0💬

What is the purpose of the File class?
What is the purpose of the File class? The File class is used to create objects that provide access to the files and directories of a local file system. 2012-12-12, 2340👍, 0💬

What happens if a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the body
What happens if a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the body of the try statement? The exception propagates up to the next higher level try-catch statement (if any) or results in the program's termination. 2013-01-18, 2338👍, 0💬

Primitive data types are passed by reference or pass by value?
Primitive data types are passed by reference or pass by value? Primitive data types are passed by value. 2013-05-16, 2337👍, 0💬

Describe the wrapper classes in Java.
Describe the wrapper classes in Java. Wrapper class is wrapper around a primitive data type. An instance of a wrapper class contains, or wraps, a primitive value of the corresponding type. Following table lists the primitive types and the corresponding wrapper classes: Primitive Wrapper boolean java... 2013-03-05, 2337👍, 0💬

What are the Object and Class classes used for?
What are the Object and Class classes used for? The Object class is the highest-level class in the Java class hierarchy. The Class class is used to represent the classes and interfaces that are loaded by a Java program. 2013-01-25, 2337👍, 0💬

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