Ja保留两位小数 Decimalsimport ja.math.BigDecimal;imp Decimals{ double f = 12345.67890; public void m1() { BigDecimal bg = new BigDeci

Chapter 1.2 PLACE VALUE WITH DECIMALS How do I know what kind of decimal it is? ? The name of a de Chapter 1.2 PLACE VALUE WITH DECIMALS How

2.1.3变量长度(width):当变量为日期型时无效 2.1.4变量小数点位数(Decimals):当变量为日 期型时无效 2.1.5变量标签(Lable):是对变量名的进一步描 述