Block initialization in a java

Blocks.java

public class Blocks {

public int i=10;
public static int j=20;

public Blocks(){
System.out.println("1");
}

public void f1(){
System.out.println("2");
}

{
System.out.println("IB");
}

{
System.out.println("SIB");
}
}

MyProgram.java
public class MyProgram {

public static void main(String[] args) {
// TODO Auto-generated method stub

System.out.println("// Block initialization in a java ");

Blocks b1 = new Blocks();

System.out.println(b1.i);
System.out.println(Blocks.j);

b1.f1();
}
}

Output: