java字符串四舍五入
时间: 2024-05-16 18:19:16 浏览: 174
在Java中,要对一个浮点数进行四舍五入,可以使用String类的format方法。使用format方法时,需要指定一个格式化字符串,其中包含了要保留的小数位数。例如,如果要对一个浮点数num进行四舍五入保留4位小数,可以使用以下代码:
double num = 3.1415926;
String result = String.format("%.4f", num);
System.out.println(result);
以上代码会输出结果为3.1416,即对num进行四舍五入并保留4位小数。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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