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2.ÕâÀïµÄ¶ÑºÍÕ»Ê×ÏÈÒªÃ÷È·ÊÇÐéÄâ»úÕ»£¬ºÍ¼Ä´æÆ÷¸ù±¾²»ÊÇÒ»¸ö¼¶±ðµÄ¶«Î÷£¬¾Í±ð±È½ÏÁË£®
3.Õ»Êý¾Ý¹²ÏíºÃÏñÊÇ×÷Õß×Ô¼º´´ÔìµÄ¸ÅÄ¶øÇÒ¸ø»ù±¾ÀàÐÍÒ²ÒýÈëÁË£¢ÒýÓ㢵ĸÅÄ²»ÖªµÀ³öÓÚºÎÖÖ´òË㣮
javaÐéÄâ»ú¹æ·¶ÖÐ˵£ºPrimitive values do not share state with other primitive values. A variable whose type is a primitive type always holds a primitive value of that type.
¿´Ò»ÏÂʵ¼ÊµÄ´¦ÀíÇé¿ö:
      int a=3;
      int b=3;
      int c=65535;
      int d=65535;
      int e=32330;
      int f=32330;
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Code:
  0:        iconst_3  //3
  1:        istore_1
  2:        iconst_3  //3
  3:        istore_2
  4:        ldc        #2; //int 65535
  6:        istore_3
  7:        ldc        #2; //int 65535
  9:        istore        4
  11:        sipush        32330
  14:        istore        5
  16:        sipush        32330


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import java.util.Vector;
import jxl.*;
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