首先,设置双精度值-
double d1 = 1.39876; double d2 = 2.39876; double d3 = 0.66920;
现在,使用新的DecimalFormat(“ 0。##### E0”)格式化双精度值-
System.out.println(new DecimalFormat("0.#####E0").format(d1)); System.out.println(new DecimalFormat("0.#####E0").format(d2)); System.out.println(new DecimalFormat("0.#####E0").format(d3));
以下是一个例子-
import java.text.DecimalFormat; public class Demo { public static void main(String[] argv) throws Exception { double d1 = 1.39876; double d2 = 2.39876; double d3 = 0.66920; System.out.println(new DecimalFormat("0.#####E0").format(d1)); System.out.println(new DecimalFormat("0.#####E0").format(d2)); System.out.println(new DecimalFormat("0.#####E0").format(d3)); } }
输出结果
1.39876E0 2.39876E0 6.692E-1