Static again: methods vs direct access

Question

Ok, I had the discussion about static some time ago.
I made some tests and have another question about that, but this time it will be a long code included.
Lets see:
TestTest.java
import java.io.*;
public class TestTest
     public static void main(String[] args)
          int amount = 100000000;
          int tester = 1;
          String testers = "X";
          long start;
          long time1=0;
          long time2=0;
          long time3=0;
          long time4=0;
          long time5=0;
          long time6=0;
          long time1s=0;
          long time2s=0;
          long time3s=0;
          long time4s=0;
          long time5s=0;
          long time6s=0;
          TestStatic blubStat     = new TestStatic();
// static instance int direct
          start = System.currentTimeMillis();
          for (int i=0;i<amount;i++)
               tester=blubStat.testint;
          time3 = System.currentTimeMillis()-start;
          System.out.println("3 :"+time3);
// static instance int method
          start = System.currentTimeMillis();
          for (int i=0;i<amount;i++)
               tester=blubStat.getint();
          time4 = System.currentTimeMillis()-start;
          System.out.println("4 :"+time4);
// static instance String direct
          start = System.currentTimeMillis();
          for (int i=0;i<amount;i++)
               testers=blubStat.teststring;
          time3s = System.currentTimeMillis()-start;
          System.out.println("3s:"+time3s);
// static instance String method
          start = System.currentTimeMillis();
          for (int i=0;i<amount;i++)
               testers=blubStat.getstring();
          time4s = System.currentTimeMillis()-start;
          System.out.println("4s:"+time4s);
          Test      blub = new Test();
// instance int direct
          start = System.currentTimeMillis();
          for (int i=0;i<amount;i++)
               tester=blub.testint;
          time5 = System.currentTimeMillis()-start;
          System.out.println("5 :"+time5);
// instance int method
          start = System.currentTimeMillis();
          for (int i=0;i<amount;i++)
               tester=blub.getint();
          time6 = System.currentTimeMillis()-start;
          System.out.println("6 :"+time6);
// instance String direct
          start = System.currentTimeMillis();
          for (int i=0;i<amount;i++)
               testers=blub.teststring;
          time5s = System.currentTimeMillis()-start;
          System.out.println("5s:"+time5s);
// instance String method
          start = System.currentTimeMillis();
          for (int i=0;i<amount;i++)
               testers=blub.getstring();
          time6s = System.currentTimeMillis()-start;
          System.out.println("6s:"+time6s);
}Test.java
import java.io.*;
public class Test
     public int     testint=5;     
     public String teststring = "Test";
     public Test()     
          testint=3;
     public int getint()     
          return testint;     
     public String getstring()     
          return teststring;     
}TestStatic.java
import java.io.*;
public class TestStatic
     public static int     testint=5;     
     public static String teststring = "Test";
     public TestStatic()     
          testint=3;
     public static int getint()     
          return testint;     
     public static String getstring()     
          return teststring;     
}Running TestTest prints the following output (JDK1.4):
3 :1100
4 :1150
3s:1100
4s:1100
5 :1210
6 :4560
5s:1310
6s:4560
As you see, the times from 6 and 6s are 4 times as high as the others.
My basic question is: Why is the access via a method so much slower when using an instanciated class??
Hope anybody can help me with this....

Answer 1

Hmm, thats what i feared. Then it seems to have no way around...
The problem is, I have a NetLib doing network communiction stuff. And one method is "isReady()", that test if I can read data from the InputStream of the socket. Now that call runs in a loop in my main program:
while (stuffnotdone)
   if (NetLib.isReady())
      NetLib.sendBack(NetLib.whatyourecieve());
}Summarized a simple echo server. And I wondered why this was so slow compared to a version without using the NetLib but copying the stuff from the Methods directly into the code.
Well then it will be a better way to get the stream and do everything in program itself or do it static.
Well then, lets see...
Thx for the answer.
Skippy