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Interface...

 
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public class Test7 implements I{
static int k = 1;
static{
k = k * 2;
}
{
k = k * 2;
}
public static void main(String args[]){
Test7 t1 = new Test7();
Test7 t2 = new Test7();
System.out.println(t1.k);
System.out.println(t2.k);
System.out.println(k);
}
}
interface I{
int k = 0;
}

How come the output is 8,8,8
 
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Try this

 
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static{ //only run one time when class loaded
k = k * 2;
}

{ //run every time when you instance an object by using new
k = k * 2;
}

Initialization
 
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