Saturday, 14 May 2011

Difference between static and init block

The static block is only loaded when the class object is created by the JVM for the 1st time whereas init {} block is loaded every time class object is created. Also first the static block is loaded then the init block.

public class LoadingBlocks {

static{
System.out.println("Inside static");
}

{
System.out.println("Inside init");
}
public static void main(String args[]){
new LoadingBlocks();
new LoadingBlocks();
new LoadingBlocks();
}
}



Output:

Inside static
Inside init
Inside init
Inside init


So static block is initialized only once, that is it is per class basis, whereas init block is per object basis.

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