java 判断是否是数值，百分比

最新推荐文章于 2025-05-06 11:59:16 发布

原创最新推荐文章于 2025-05-06 11:59:16 发布

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/*判断是否是数值*/
public static boolean isNumeric(String str){
		return str.matches("-?[0-9]+.*[0-9]*");
}
/*转化成数值Integer*/
 public int switchInteger(Object obj) {
		int res = 0;
		if (null != obj) {
			double result = Double.parseDouble(obj.toString()) ;
			res = (int)result;		
		}
		return res;
	}
	/*转化成数值Double*/
   public Double switchDouble(Object obj) {
		double res = 0.00;
		if (null != obj) {
			res = Double.valueOf(obj.toString());
		}
		return res;
	}
	/*百分比*/
	public   static  String percent(double p1,double  p2){
       String str ;
       double  p3  =  p1  /  p2;
       NumberFormat nf  =  NumberFormat.getPercentInstance();
       nf.setMinimumFractionDigits(0);
       str  =  nf.format(p3);
       return  str;
   }