not clear with the basics of nullpont error; trying to create student database
 
import java.io.*;
class student1
{
String name;
int id;
public void getdata(String name1,int id1)
{
name=name1;
id=id1;
}
public void putdata()
{
System.out.println("\t"+id+" "+name);
}
}
class student
{
public static void main(String args[])throws IOException
{
BufferedReader br= new BufferedReader(new 
 
InputStreamReader(System.in));
BufferedReader br1= new BufferedReader(new 
 
InputStreamReader(System.in));
student1[] n=new student1[10];
for(int i=0;i<5;i++)
{
n[i].getdata(br.readLine(),Integer.parseInt(br1.readLine()));
n[i].putdata();
 
}
}
}

 
java:29 line 29
thanks

 
n[i].getdata(....)
tried without using BufferedReader directly putting values but same error.Object seems to be null.

 
thanks a lot a bunch it worked

 
Dear James
i wished you could solve this NPE too. i am trying to separate the words and print the longest. i tried using s.length but found difficult
getting error at toCompare which compares the length of strings
 
class maxstring1
{
public static void main(String args[]) 
{
String s1="nikhil is a good boy";
int d;int x=0;
d=s1.length();
String[] s2=new String[20]; 
char ch;
for(int i=0;i<=d-1;i++)
{
ch=s1.charAt(i);
if(ch==' ')
{
s2[i]=new String();
s2[i]=s1.substring(x,i-1);
x=i+1;
}
}
for(int i=0;i<=d-1;i++)
{
s2[i]=new String();
System.out.println(s2[i]);
if(s2[i].compareTo(max)>0)
max=s2[i];
}
System.out.println(max);
}
}