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  • java 对象转整数,两个整数相除转百分数

    public class MathUtil {
        
        public static void main(String[] args) {
            System.out.println(toPercent(1,3));
            System.out.println(toPercent(3,1));
        }
        
        //a/b转百分数字符串 (double)Math.round( a/(double)b*1000)/1000:保留3位小数四舍五入
        private static String toPercent(int a,int b) {
            if (a%b==0) {
                return a/b*100+"%";
            }else {
                return (double)Math.round( a/(double)b*1000)/10+"%";
            }
        }
        
        //Object转整数(失败返回null)
        private Integer toInt(Object o) {
            if (o!=null && !"".equals(o.toString())) {
                try {
                    int parseInt = Integer.parseInt(o.toString());
                    return parseInt;
                } catch (NumberFormatException e) {
                    e.printStackTrace();
                    return null;
                }
            }
            return null;
        }
    }
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  • 原文地址:https://www.cnblogs.com/libin6505/p/10822189.html
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