Whether there are numbers in the Java string

Http://www.cnblogs.com/zhangj95/p/4198822.html

Http://www.cnblogs.com/sunzn/archive/2013/07/12/3186518.html

Reference:

1  packagecn.sunzn.demo;2 3 Importjava.util.regex.Matcher;4 Importjava.util.regex.Pattern;5 6  public classDemo {7      public Static voidmain (string[] Args) {8System.out.println (iscontainchinese ("china")));9     }Ten  one      public Static BooleanIscontainchinese (String Str) { a  -Pattern p = pattern.compile ("[\u4e00-\u9fa5]"); -Matcher m =P.matcher (str); the         if(m.find ()) { -             return true; -         } -         return false; +     } -}

In my own case, find works.

1  packagesdf;2 3 Importjava.util.regex.Matcher;4 Importjava.util.regex.Pattern;5 6  public classD {7 8      public Static Booleanisnumeric (String Str) {9          for(inti = Str.length (); I. >= 0;) {Ten             if(!character.isdigit (str.charat (i))) { one                 return false; a             } -         } -         return true; the     } -      public Static voidmain (string[] Args) { -         //TODO auto-generated Method Stub -  +String s1= "25"; -String s2= "retake"; +Pattern pattern = Pattern.compile ("\\d+"); a          atMatcher Matcher1 =Pattern.matcher (s1); -           //boolean b1= matcher1.matches (); -           Booleanb1=Matcher1.find (); - System.out.println (b1); -            -Matcher Matcher2 =Pattern.matcher (s2); in           //boolean b2= matcher2.matches (); -           BooleanB2=Matcher2.find (); to System.out.println (b2); +          -         //System.out.println (isnumeric (s1)); the        //System.out.println (isnumeric (s2)); *  $     }Panax Notoginseng  -}

Whether there are numbers in the Java string