A static initializer block is a free hanging block in a Java class. It is used mainly for initialization. It is very similar to a constructor, but it cannot be inherited. The static initializer block is declared as follows:
static
{
int i = 5;
//more static initializations
}
This block has neither any return type nor any access modifier. This is why it is known as a free hanging static initializer block. Unlike a constructor, a static initializer block is executed only once, at the time of class loading.
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