What are runtime exceptions?

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Runtime exceptions are those exceptions that are thrown at runtime because of either wrong input data or because of wrong business logic etc. These are not checked by the compiler at compile time.

2013-05-28, 2337👍, 0💬

How to create custom exceptions?
How to create custom exceptions? Your class should extend class Exception, or some more specific type thereof. 2013-05-29, 2489👍, 0💬

Why do we need wrapper classes?
Why do we need wrapper classes? It is sometimes easier to deal with primitives as objects. Moreover most of the collection classes store objects and not primitive data types. And also the wrapper classes provide many utility methods also. Because of these resons we need wrapper classes. And since we... 2013-05-27, 2444👍, 0💬

If I want an object of my class to be thrown as an exception object, what should I do?
If I want an object of my class to be thrown as an exception object, what should I do? The class should extend from Exception class. Or you can extend your class from some more precise exception type also. 2013-05-30, 2415👍, 0💬

What is the difference between error and an exception?
What is the difference between error and an exception? An error is an irrecoverable condition occurring at runtime. Such as OutOfMemory error. These JVM errors and you can not repair them at runtime. While exceptions are conditions that occur because of bad input etc. e.g. FileNotFoundException will... 2013-05-29, 2394👍, 0💬

What are wrapper classes?
What are wrapper classes? Java provides specialized classes corresponding to each of the primitive data types. These are called wrapper classes. They are e.g. Integer, Character, Double etc. 2013-05-27, 2394👍, 0💬

Give a simplest way to find out the time a method takes for execution without using any profiling tool?
Give a simplest way to find out the time a method takes for execution without using any profiling tool? Read the system time just before the method is invoked and immediately after method returns. Take the time difference, which will give you the time taken by a method for execution. To put it in co... 2013-05-24, 2367👍, 0💬

What are checked exceptions?
What are checked exceptions? Checked exception are those which the Java compiler forces you to catch. e.g. IOException are checked Exceptions. 2013-05-28, 2363👍, 0💬

What are runtime exceptions?
What are runtime exceptions? Runtime exceptions are those exceptions that are thrown at runtime because of either wrong input data or because of wrong business logic etc. These are not checked by the compiler at compile time. 2013-05-28, 2338👍, 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, 2319👍, 0💬

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