Building Faster Java
By Harshad Oak

Code Listing 1: OptimizationTrial.java before first CodeCoach run

package oramag.client;
import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;
import java.util.Date;

public class OptimizationTrial {
    public OptimizationTrial() {
    }

    static int count=99999;
    
    public static void main(String[] args) throws IOException{
        todaysDay();
        demoArrayListOptimized(count);
        demoArrayList(count);
    }
    
    public static void todaysDay() throws IOException{
        Object today = fetchTodaysDay();
        if (today instanceof String) {
            System.out.println("The object 'today' is always a String. Check unnecessary");
        }
        
        System.out.println("Today is >>>" + today);
    }    
    
    public static Object fetchTodaysDay() {
        SimpleDateFormat sfInput = new SimpleDateFormat("EEEEEEEEE");
        return sfInput.format(new Date());
    }
    
    public static void demoArrayList(int number) {
      System.out.println("Unoptimized Run");
      ArrayList ar= new ArrayList ();
      //NOTE: Change number to zero to demonstrate codecoach and audit features
      for(int i=0; i<0; i++) {
        ar.add(new Integer(i));
      }
    }
    
    public static void demoArrayListOptimized(int numberOpt) {
      System.out.println("Optimized Run");
      ArrayList ar= new ArrayList (numberOpt);
      for(int i=0; i<numberOpt; i++) {
        ar.add(new Integer(i));
      }
    }      
}

Code Listing 2: OptimizationTrial.java after CodeCoach optimization

package oramag.client;
import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;
import java.util.Date;

public final class OptimizationTrial {
    public OptimizationTrial() {
    }

    private static final int count=99999;
    
    public static void main(String[] args) throws IOException{
        todaysDay();
        demoArrayListOptimized(count);
        demoArrayList(count);
    }
    
    private static void todaysDay() throws IOException{
        Object today = fetchTodaysDay();
        //if (today instanceof String) {
            System.out.println("The object 'today' is always a String. Check unnecessary");
        //}
        
        System.out.println("Today is >>>" + today);
    }    
    
    private static Object fetchTodaysDay() {
        SimpleDateFormat sfInput = new SimpleDateFormat("EEEEEEEEE");
        return sfInput.format(new Date());
    }
    
    private static void demoArrayList(int number) {
      System.out.println("Unoptimized Run");
      ArrayList ar= new ArrayList ();
      //NOTE: Change number to zero to demonstrate codecoach and audit features
      for(int i=0; i<number; i++) {
        ar.add(new Integer(i));
      }
    }
    
    private static void demoArrayListOptimized(int numberOpt) {
      System.out.println("Optimized Run");
      ArrayList ar= new ArrayList (numberOpt);
      for(int i=0; i<numberOpt; i++) {
        ar.add(new Integer(i));
      }
    }      
}