头发凌乱的小博客

String [] str = {"Java", "C++", "Php", "C#", "Python", "C++", "Java"};              for (String elementA:str ) {                  System.out.print(elementA + " ");              }              List lis

只能包含2为小数 1.var pattern =/^([0-9]+(\.[0-9]{2})?|0\.[1-9])$/;    只允许输入汉字、数字、字母、*、×、+、‐、≥、≤、(、)、±、/、.、\\ 2.var pattern = /^[\%\,\&\【\】\s\w\(\（\）\)\+\-\/\*\×\±\.\\\u4e00-\u9fa5]*$/; 只能输入1-9 3.var