1 publicclasstest1_format{ 2 publicstaticvoidmain(String[]args){ 3 BigDecimaldecimal=newBigDecimal("1.12345"); 4 System.out.println(decimal); 5 BigDecimalsetScale=decimal.setScale(4,BigDecimal.ROUND_HALF_DOWN); 6 System.out.println(setScale); 7 8 BigDecimalsetScal...