Core Java preguntas y respuestas de entrevista
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Pregunta 216. How many static init can you have ?
As many as you want, but the static initializers and class variable initializers are executed in textual order and may not refer to class variables declared in the class whose declarations appear textually after the use, even though these class variables are in scope.
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Pregunta 217. What is mutable object and immutable object?
If a object value is changeable then we can call it as Mutable object. (Ex., StringBuffer, ') If you are not allowed to change the value of an object, it is immutable object. (Ex., String, Integer, Float, ')
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Pregunta 218. What is the basic difference between string and stringbuffer object?
String is an immutable object. StringBuffer is a mutable object.
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Pregunta 219. What is the byte range?
128 to 127
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Pregunta 220. Can a double value be cast to a byte?
Yes, a double value can be cast to a byte.
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Lo mas util segun los usuarios:
- How could Java classes direct program messages to the system console, but error messages, say to a file?
- What are the differences between an interface and an abstract class?
- Why would you use a synchronized block vs. synchronized method?
- How can you force garbage collection?
- What are the differences between the methods sleep() and wait()?