Like others have said # formats a digit but drops zeros. In your example where you apply .### to a double like 12.34 it would format to ... ... <看更多>

<code>DecimalFormat</code> provides rounding modes defined in. * {@link java.math.RoundingMode} for formatting. By default, it uses. * {@link java.math. ... <看更多>

Java Decimal Format class can be used to display digits in the desired format. According to the Java Docs ... ... <看更多>

可以使用DecimalFormat 类将十进制数字格式化为特定于Locale 的字符串。 ... DecimalFormatSymbols; import java.text.NumberFormat ... ... <看更多>

NumberFormat 還蠻好用的 NumberFormat formatter = new DecimalFormat("000000"); String s = formatter.format(-1234.567); // -001235 formatter ... ... <看更多>