public static boolean isNumeric(String str){	// 就是判斷是否為整數(正負)	Pattern pattern = 		Pattern.compile("^//d+$|-//d+$"); 	//判斷是否為小數(正負)	Pattern pattern2 = 		Pattern.compile("//d+//.//d+$|-//d+//.//d+$");	return (pattern.matcher(str).matches() 		|| pattern2.matcher(str).matches());1}//測試System.out.PRintln(isNumeric("232"));System.out.println(isNumeric("2.32"));System.out.println(isNumeric("-2.32"));System.out.println(isNumeric("-232"));System.out.println(isNumeric("0"));