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/* ¸ßÊÖÖ®×÷£¬±¾È˽÷ÒÔÊÕ²ØÕßÉí·ÝÄóö¹²Ïí¹©´ó¼Ò²Î¿¼! */
/*
* ÏòÁ¿½Ó¿Ú
*/
package dsa;
public interface Vector {
//·µ»ØÏòÁ¿ÖÐÔªËØÊýÄ¿
public int getSize();
//ÅжÏÏòÁ¿ÊÇ·ñΪ¿Õ
public boolean isEmpty();
//È¡ÖÈΪrµÄÔªËØ
public Object getAtRank(int r)
throws ExceptionBoundaryViolation;
//½«ÖÈΪrµÄÔªËØÌ滻Ϊobj
public Object replaceAtRank(int r, Object obj)
throws ExceptionBoundaryViolation;
//²åÈëobj£¬×÷ΪÖÈΪrµÄÔªËØ£»·µ»Ø¸ÃÔªËØ
public Object insertAtRank(int r, Object obj)
throws ExceptionBoundaryViolation;
//ɾ³ýÖÈΪrµÄÔªËØ
public Object removeAtRank(int r)
throws ExceptionBoundaryViolation;
}
/*
* »ùÓÚÊý×éµÄÏòÁ¿ÊµÏÖ
*/
package dsa;
public class Vector_Array implements Vector {
private final int N = 1024;//Êý×éµÄÈÝÁ¿
private int n = 0;//ÏòÁ¿µÄʵ¼Ê¹æÄ£
private Object[] A;//¶ÔÏóÊý×é
//¹¹Ô캯Êý
public Vector_Array() {
A = new Object[N];
n = 0;
}
//·µ»ØÏòÁ¿ÖÐÔªËØÊýÄ¿
public int getSize() { return n; }
//ÅжÏÏòÁ¿ÊÇ·ñΪ¿Õ
public boolean isEmpty() { return (0 == n) ? true : false; }
//È¡ÖÈΪrµÄÔªËØ
public Object getAtRank(int r)//O(1)
throws ExceptionBoundaryViolation {
if (0 > r || r >= n) throw new ExceptionBoundaryViolation("ÒâÍ⣺ÖÈÔ½½ç");
return A[r];
}
//½«ÖÈΪrµÄÔªËØÌ滻Ϊobj
public Object replaceAtRank(int r, Object obj)
throws ExceptionBoundaryViolation {
if (0 > r || r >= n) throw new ExceptionBoundaryViolation("ÒâÍ⣺ÖÈÔ½½ç");
Object bak = A[r];
A[r] = obj;
return bak;
}
//²åÈëobj£¬×÷ΪÖÈΪrµÄÔªËØ£»·µ»Ø¸ÃÔªËØ
public Object insertAtRank(int r, Object obj)
throws ExceptionBoundaryViolation {
if (0 > r || r > n) throw new ExceptionBoundaryViolation("ÒâÍ⣺ÖÈÔ½½ç");
if (n >= N) throw n
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