praxis20-1.java

class Exception1 extends Exception{}
class Exception2 extends Exception1{}
class Exception3 extends Exception2{}
class Lazy{
    public void foot(int i) throws Exception1 {
      if(i == 1){
        throw new Exception1();
      } else if(i==2){
        throw new Exception2();   
      } else if(i==3){
        throw new Exception3()
      }
    }
}