Method 1: Keep two decimal places
DecimalFormat df = new DecimalFormat("#.00"); double d1 = 1.23456 double d2 = 2.0; double d3 = 0.0; System.out.println(df.format(d1),df.format(d2),df.format(d3));
Output result:
1.23 2.00 0.00
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Method 2: Keep two decimal places and round
Example 1:
public class TwoDecimal { public static void main(String[] args) { double f = 23.456; BigDecimal bigDecimal = new BigDecimal(f); //这里的 2 就是你要保留几位小数。 double f1 = bigDecimal.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); System.out.println("保留两位小数 : " + f1); } }
Output result:
保留两位小数 : 23.46
Example 2:
public class qq { public static void main(String[] args) { double i = 23.546; NumberFormat nf = NumberFormat.getNumberInstance(); // 2是显示的小数点后的显示的最多位,显示的最后位是舍入的 nf.setMaximumFractionDigits(2); String result = nf.format(i); System.out.print("结果是:"+result); } }
Output result:
结果是 :23.55
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