Can we execute Java program without main method?

Yes, we can execute java program without main method by using static block.

A static block in Java is a set of statements that are executed only once when the Java ClassLoader loads a class into memory, also known as a static initialization block. Static initialization blocks go directly into stack memory.

Example

class StaticInitializationBlock{
   static{
      System.out.println("class without a main method");
      System.exit(0);
   }
}

In the above example, we can execute a java program without main method (until Java 1.6 version). Java 7 and newer versions do not allow this because the JVM checks for the existence of the main method before initializing the class.

Output

class without a main method.

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