Instance init block concept in Java

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If in a code we have a instance initialization code then that code is executed after the constructor's call to the super() is complete
so in the following program output should be:

class Init {
Init(int x) { System.out.println("1-arg const"); }
Init() { System.out.println("no-arg const"); }
static { System.out.println("1st static init"); }
{ System.out.println("1st instance init"); }
{ System.out.println("2nd instance init"); }
static { System.out.println("2nd static init"); }
public static void main(String [] args) {
new Init();
new Init(7);
}
}  more...