2 errors: static context & java.lang.String

Question

I get the following 2 errors when I try and compile my code. What do I need to do in order to fix this problem?
Any help appreciated.
C:\>javac DraftD.java
DraftD.java:54: non-static variable MAXIMUM cannot be referenced from a static context
if(temp <= MAXIMUM)
^
DraftD.java:54: operator <= cannot be applied to java.lang.String,int
if(temp <= MAXIMUM)
^
2 errors
import java.io.*;
import java.util.*;
public class DraftD
final int MAXIMUM = 20;
public static void main(String[] args) throws IOException
try
Runtime program = Runtime.getRuntime();
Process proc = program.exec("cmd.exe /c C:/ntpq.exe -p >C:/answer.txt");
try{
proc.waitFor();
catch (InterruptedException e){}
catch(IOException e1)
int i = 0;
BufferedReader br = new BufferedReader(new FileReader("C:/answer.txt"));
String line = "";
while ((line = br.readLine()) != null)
i++;
if(i==3) break;
br.close();
if(i==3)
StringTokenizer st = new StringTokenizer(line," ");
     int k=1;
while(st.hasMoreTokens())
     String temp = st.nextToken();
if(k==2){
          String secondToken = temp;
if(temp <= MAXIMUM)
          {System.out.println("less than Max");}
     k++;
else System.out.println("less than 3 lines in file");
System.exit(0);
}

Answer 1

You should use Integer.parseInt(temp); to convert temp to an int
Because MAXIMUM is not static, every DraftD object will have one, that's the way properties work.
main() however is static, and so there is only one between all the DraftD objects.
It is a bit harder to explain with main(), but suppose we did this:public class ABC
  public int x;
  public static int getX()
    return x;
ABC a = new ABC();
ABC b = new ABC();
a.x = 1;
b.x = 2;
int result = ABC.getX();should result be 1 or 2? it doesn't know which x to get, so the compiler complains.
if MAXIMUM is a constant, you should make it public static final