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Java / Class Variables (Static Variables)

Can we execute a program without main () method?

Yes, it is possible in previous versions of Java, not since JDK 1.7 using static block.

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How do I define a constant? What are static variables? Explain static keyword in Java. What is a static class in Java? What is a static block? Can we have multiple static blocks in a Java Class? Can Interface in Java have static methods? Can we overload static methods in java? Can we override static methods in java? Can we invoke a superclass static method from the subclass? Can we serialize static variables? What is a static import? Can we execute a program without main () method?

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Instance Variables (Non Static Variables)

Comments & Discussions

OOPS Concepts and its implementation in Java 18 Inheritance 29 Java Identifiers 4 JDK, JRE, JVM, JIT 69 Object, Class and Package 44 Variable 9 Class Variables (Static Variables) 13 Instance Variables (Non Static Variables) 3 Local Variables 6 Operators 9 Package 10 Data types 10 Modifiers 29 Methods 38 Control Statements 12 Access Modifiers 5 Constructor 38 Interface 46 Abstract Class 19 Enum 20 Arrays 11 Strings 32 Using String 29 Exception 55 Collections 56 List and its implementations 22 Map and its implementations 36 Set and its implementations 23 Queue and its implementations 4 Regular expressions 3 Design Patterns 75 Generics 20 Casting 5 volatile 13 Java ThreadLocal 10 Java Multithreading 113 Java Multithreading part II 17 final keyword 13 static keyword 16 Concurrent collections 55 Java Serialization 36 JDBC 53 JNDI 17 RMI 6 JAXB 10 JMX 9 log4j 18 Annotations 10 XML 14 Garbage collection 31 Programs 8 JVM 4 Java8 streams 25 JavaFX 6 Autosys 9

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