I have a hash table that is implemented using a node array, where the node contains a string and a boolean to check if there was a string there before for when searching for an element after elements have been deleted. I am getting a nullpointerexception at a place that I don't understand how I possibly could, in this line:
while(T.getElement(place) != null)
This is my code to do the loop that is throwing the exception.
Get Element is here:
public String getElement(int index){
if (index != lastProbed)
probeCount++;
lastProbed = index;
return table[index].str;
}
And this is my node class:
class Node {
boolean hadStr;
String str;
public Node() {
str = null;
hadStr = false;
}
}
I don't understand how I could be getting a null pointer in a place where I am just checking if a string is null.
Why not
public String getElement(int index){
if (index != lastProbed)
probeCount++;
lastProbed = index;
if (table[index] != null) {
return table[index].str;
}
return null;
}
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