How to integrate two codes ?

Question

A.java
class A
     public static void main(String args[])
System.out.println("hello");
     // code
Format.java
import java.util.*;
class Format
public static void main(String args[])
System.out.println("hi");
// code
how to integrate two codes ?

Answer 1

Please be a little more explicit about what you're doing, what you expect to happen, and what you actually observe - "integrate two codes" isn't very clear.
Please post a short, concise, executable example of what you're trying to do. This does not have to be the actual code you are using. Write a small example that demonstrates your intent, and only that. Wrap the code in a class and give it a main method that runs it - if we can just copy and paste the code into a text file, compile it and run it without any changes, then we can be sure that we haven't made incorrect assumptions about how you are using it.
Post your code between [code] and [/code] tags as described in Formatting Help on the message entry page. Cut and paste the code, rather than re-typing it (re-typing often introduces subtle errors that make your problem difficult to troubleshoot). Please preview your post when posting code.
If you don't know where to start, here are some excellent resources:
http://java.sun.com/docs/books/tutorial/
http://java.sun.com/developer/onlineTraining/Programming/BasicJava1/compile.html
http://java.sun.com/learning/new2java/index.html
http://javaalmanac.com
http://www.jguru.com
http://www.javaranch.com
Bruce Eckel's Thinking in Java
Joshua Bloch's Effective Java
Bert Bates and Kathy Sierra's Head First Java