The java compiler converts high-level java code into bytecode (which is also a type of machine code). An interpreter is a program which converts a program at one level to another programming language at the same level. Example conversion of Java program into C++ In Java, the Just In Tim...
What is constructor chaining and how is it achieved in Java? A child object constructor always first needs to construct its parent. In Java it is done via an implicit call to the no-args constructor as the first statement. Can a double value be cast to a byte? Yes, a double value can...
Explore Program 34. What do you understand by Lexical Scoping? Lexical Scoping in JavaScript means a function can use values declared in its parent’s scope but its parent cannot do the same. Lexical Scope implies the block of code in which a function or variable is declared. Variables decl...
It is a programming concept that allows running multiple tasks within one single program in a concurrent manner. 4) When and by whom was Java developed? Java was developed in 1995 by James Gosling. Top Java Interview Questions and Answers – Set 2 1) What do JVM, JRE, and JDK stand for...
JavaOne Preview: Java Functional Programming in an Interview with GridGain CEO Nikita IvanovTim Cull
67)What does it mean that Java Strings are immutable? Strings in Java are immutable to provide security to all variables used in the program, thread-safe (they can be shared among threads without having a native code) and optimum formemory (using logical string pooling). ...
Java Interview Questions and Answers Ques 11: What are the consequences if we do not declare the `main` method as `static` in Java? Ans. If we do not declare the main method as static in Java, we will get a compilation error, and our program will not run. The static keyword is ...
We can run a java program directly throughjavacommand. The source file will be implicitly compiled and executed. It’s part of the JEP 330 feature implementation. There are 6 new methods added in String class – isBlank(), lines(), strip(), stripLeading(), stripTrailing(), and repeat()...
Java exception class hierarchy diagram overview: What is the difference between Exception and Error? In Java, all exceptions have a common ancestorjava.langpackageThrowableclass.ThrowableThe class has two important subclasses: Exception: Exceptions that can be handled by the program itself can be caugh...
作为一名JAVA开发人员来说,JAVA涉及到的面太广了,我们就拿企业级开发人员即J2EE开发人员的基本功来说事吧! 在面试前先问自己5个问题: 1. 我想要什么 2. 我会什么 3. 目前的市场需要什么 4. 目前我还缺什么 5. 如何去补缺 一个J2EE高级开发人员需要具备些什么技能?