class max{
public int buy;
public int sell;
public max(int n){
buy=0;
sell=0;
}
}
public class MaxProfit{
public void stock(int a[],int n){
max[] sol=new max[n/2+1];
if(n==1||n==0)
{
return;
}
int i=0,count=0;
while(i<n-1){
while((i<n-1)&&(a[i+1]<=a[i]))
i++;
if(i==n-1)
break;
//System.out.println(sol[count].buy=i++);
sol[count].buy=i++;
i++;
while((i<n)&&(a[i]>=a[i-1]))
i++;
sol[count].sell=i-1;
count++;
}
for(int k=0;k<count;k++)
System.out.println(sol[k].buy +sol[k].sell);
}
public static void main(String []args){
MaxProfit f=new MaxProfit();
int arr[]={20,100,260};
f.stock(arr,arr.length);
System.out.println("Hello World");
}
}
A Exception is coming which is exception in thread "main" java.lang.NullPointerException at MaxProfit.stock(MaxProfit.java:15) at MaxProfit.main(MaxProfit.java:32)
I am not able to solve this I have initialized array of max still I am getting null pointer exception Please help
You should initialize the elements of max[] sol maybe in a loop.
for(int i=0;i<sol.length;i++){
sol[i]=new max(aValue);
}
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