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1¡¢ ´®²Ù×÷£ºÊ¹ÓÃ×Ö·û´®´æÖüÒ»¸öÓ¢Îľä×Ó“Java is an object oriented programming
 language”¡£ÏÔʾ¸Ã¾ä×Ó£¬²¢Ëã³öÿ¸öµ¥´ÊµÄ×ÖĸÊýºÍƽ¾ù×ÖĸÊý£¬²¢°´µ¥´ÊÉýÐòÅÅÁÐÊä³ö£¨²»ÓÃÊý×飬ֻÓô®²Ù×÷£©
public class homework21 {
   public static void main(String[] args) {
          String java = "Java is an object oriented programming language.";
          float sum1= java.length();                   //×Ö·û´®³¤¶È48
          System.out.println(java);                  //Êä³ö×Ö·û´®
          StringBuffer copyToMe = new StringBuffer();//¶¨Ò建³åÇø
          int i = 0;
          int number=0;
          int length=0;
          float sum=0;
          char c = java.charAt(i);                  
//·µ»Ø×Ö·û´®¶ÔÏóÖеÚi¸öλÖõÄ×Ö·û
          while(i<sum1)
          {
                if (c != ' ')
                {
                  if(c=='.')//×îºóÒ»¸öµ¥´ÊµÄÅжÏ
                   {


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