Import optimization

Question

Hello everyone. I am a C++ programmer who knows enough Java to be dangerous. I have been assigned to port one of our existing applications to a Java/J2ME environment to be run on a cell phone. I am trying to find out the best techniques for writing efficient bytecodes. I am already using an obfuscator to shrink my JAR file. The compression level is set to 9 (this is as far as it goes in NetBeans). I am wondering if more optimization can be acheived. If I use wildcards in my import statements will my compiled class file be larger than if I were to use the specific class names in my import statements? Are there any commonly used techniques to acheive a higher level of optimization?

Answer 1

import just tells the compiler where to look for classes used in the source.import java.util.*;
List a = new ArrayList();andimport java.util.List;
import java.util.ArrayList;
List a = new ArrayList();both compile tojava.util.List a = new java.util.ArrayList();