Wrappers

         //ok
         Boolean b=true;
         Boolean b2 = new Boolean("True");
         Boolean b22 = new Boolean("trUe");
         assertEquals(b22, b2); //pass
         assertTrue(b22==true); //pass
  
         Boolean b3= new Boolean(null);
         assertTrue(b3==false); //pass

         Boolean b4= new Boolean("Yes");
         assertTrue(b4==false); //pass

         if(b4){/*Do sth:D*/} //ok

         //Integer
         Integer x=Integer.valueOf("1011", 2);
         prn(x); //11
       //Float
         float f= Float.valueOf("3.14f");
         prn(f); //3.14