新手,没接解过,不知道怎样声明,调用vec.setElementAt(object arg1,int arg2)时第一个参数明显不能是整型的数字....怎样做才能做到像数组那样
å½ç¶å¯ä»¥ãé¦å Vector æ¬èº«å°±æ¯å¯å®ç°èªå¨å¢é¿ç对象æ°ç»ãjava.util.vectoræä¾äºåéç±»(vector)以å®ç°ç±»ä¼¼å¨ææ°ç»çåè½ãå¨Javaè¯è¨ä¸æ²¡ææéçæ¦å¿µï¼ä½å¦ææ£ç¡®çµæ´»å°ä½¿ç¨æéåç¡®å®å¯ä»¥å¤§å¤§æé«ç¨åºçè´¨éãæ¯å¦å¨c,c++ä¸æè°çâå¨ææ°ç»âä¸è¬é½ç±æéæ¥å®ç°ã为äºå¼¥è¡¥è¿ä¸ªç¼ºç¹ï¼Javaæä¾äºä¸°å¯çç±»åºæ¥æ¹ä¾¿ç¼ç¨è 使ç¨ï¼vector类便æ¯å ¶ä¸ä¹ä¸ãäºå®ä¸ï¼çµæ´»ä½¿ç¨æ°ç»ä¹å¯ä»¥å®æåéç±»çåè½ï¼ä½åéç±»ä¸æä¾å¤§éçæ¹æ³å¤§å¤§æ¹ä¾¿äºç¨æ·ç使ç¨ã
æ·»å å
ç´ åè½ï¼
(1)public final synchronized void adddElement(Object obj)
(2)public final synchronized void setElementAt(Object obj,int index)
å°indexå¤ç对象设置æobjï¼åæ¥ç对象å°è¢«è¦çã
(3)public final synchronized void insertElement(Object obj,int index)
å¨indexæå®çä½ç½®æå
¥objï¼åæ¥å¯¹è±¡ä»¥åæ¤åç对象ä¾æ¬¡å¾å顺延ã
å é¤åè½ï¼
(1)public final synchronized void removeElement(Object obj)
ä»åéä¸å é¤obj,è¥æå¤ä¸ªåå¨ï¼åä»åé头å¼å§è¯ï¼å é¤æ¾å°ç第ä¸ä¸ªä¸objç¸åçåéæåã
(2)public final synchronized void removeAllElement();
å é¤åéææç对象
(3)public fianl synchronized void removeElementAt(int index)
å é¤indexææçå°æ¹ç对象
æ¥è¯¢æç´¢åè½ï¼
(1)public final int indexOf(Object obj)
ä»åé头å¼å§æç´¢obj,è¿åæéå°ç第ä¸ä¸ªobj对åºçä¸æ ï¼è¥ä¸åå¨æ¤obj,è¿å-1.
(2)public final synchronized int indexOf(Object obj,int index)
ä»indexæ表示çä¸æ å¤å¼å§æç´¢obj.
(3)public final int lastindexOf(Object obj)
ä»åéå°¾é¨å¼å§éåæç´¢obj.
(4)public final synchornized int lastIndex(Object obj,int index)
ä»indexæ表示çä¸æ å¤ç±å°¾è³å¤´éåæç´¢obj.
(5)public final synchornized firstElement()
è·ååé对象ä¸çé¦ä¸ªobj
(6)public final synchornized Object lastElement()
è·ååé对象çæåä¸ä¸ªobj