±Û¾´ÀÌ :°í°æȯ 1998³â 5¿ù 13ÀÏ 18:39:16
vector¹è¿À» ÀÌ¿ëÇÏ·Á°í Çϴµ¥
v1[i].addElement( new Integer(1));¿¡¼ nullpointerexceptionÀÌ
³³´Ï´Ù.
vector¹è¿»ç¿ë¹ýÀÌ Æ²¸°°ÍÀÎÁö ´Ù¸¥ ¹æ¹ýÀÌ ÀÖ´ÂÁö ºÎŹµéÀÔ´Ï´Ù.
import java.util.*;
class VectorTest
{ public static void main(String[] args)
{ Vector[] v1 = new Vector[10];
for(int i=0;i
v1[i].addElement( new Integer(1));//error
v1[i].addElement( new Integer(2));
v1[i].addElement( new Integer(3));
int sum = 0;
for(int n = 0; n < v1[i].size(); ++n)
sum += ((Integer) v1[i].elementAt(n)).intValue();
System.out.println( sum ); // 6
}
}
}