java float保留一位小数

要在Java中保留一个float的一位小数，可以使用以下代码:
float num = 3.14159f;
float result = ((float)Math.round(num * 10))/10;
System.out.println("result: " + result); // 输出结果 result: 3.1 [1]

这段代码会将浮点数乘以10，取最近的整数，再除以10，从而保留一位小数。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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