int 转double , 转float

Integer log = 21424344;
Double log1 = log.doubleValue() / 1000000;
System.out.println(log1);
BigDecimal b = new BigDecimal(log1);
double d2 = b.setScale(11, BigDecimal.ROUND_DOWN).doubleValue();
System.out.println(d2);

Integer a = 222;
float v = a.floatValue();
System.err.println(v);