create a test class (main method) to start(run) the class in Java

Maybe I do not understand something.
So I've created the class in Java, which does some stuff.I need to create a main method or mainClass, that will start(run) my class. (I do not mean JUnit).
Question: how to do it?
is there some sort of methodology?
described in the books somewhere?

Help me please

You should create another class that consists of the main class.

Code :

---

package myproject;
 
public class Helloworld {
 
public static void main(String[] args) {
            System.out.println("Hello world");
    }
}

---

Was that helpfull?I mean the structure is like this.I use netbeans IDE.There all i do is to right click on the project ,select new JAVA class,write the class and then creating an object of her for instance in main

Yes,I agree.but what if it is something complicated?
like this

Code :

---

package handler;
 
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
 
public class TextHandler extends Handler {
	private ArrayList<String> fileTypes = new ArrayList<String>();
	private String extension;
	private String data;
 
	public TextHandler(Handler next) {
		super(next);
		fileTypes.add("html");
	 	fileTypes.add("htm");
	 	fileTypes.add("css");
	 	fileTypes.add("js");
	 	}
 
	public Response handle(Request1 recvest){
 
		 String uri=recvest.getParameter("URI");
		 if (uri != null) {
		  String extension = uri.substring(uri.lastIndexOf('.')+ 1);
	     }else{
	      return super.handle(recvest);
		 }
 
		 if (!fileTypes.contains(extension)){
		  return super.handle(recvest);
		 }
		 String webRoot = Configurator.getInstance().getSettingsParameter("web-root");
	     String filePath=webRoot+uri;
 
	     File file = new File(filePath);
	     if(!file.exists()){
	      super.handle(recvest);
	     }
	     try{
           FileInputStream fis = new FileInputStream(file);
	       DataInputStream din=new DataInputStream(fis);
	       byte[] bytes;
	       int length= din.read(bytes);
	       String data=new String(bytes,0,length);
	       din.close();
	       fis.close();
	      }catch (FileNotFoundException fnfex) {
	        super.handle(recvest);
	      } catch(IOException ioex){
	        super.handle(recvest);
	      }
 
	     String[] ParamArray = {"HTTP/","Server","ContentType","Content-Length","Content-Type","Connection"};
 
	     String totalResponse = ParamArray[0]+"1.1"+"200 OK"+"/n"+
	        	    		    ParamArray[1]+"YuriyServer/2009-09-09 "+"/n"+
	        	    		    ParamArray[2]+(int)file.length()+"/n"+
	        	                ParamArray[3]+"text"+extension+"/n"+
	        	    		    ParamArray[4]+"close"+"/n";
	          ResponsBuilder responsBuilder=new ResponsBuilder();
	          responsBuilder.buildRespons(totalResponse.getBytes());
	          responsBuilder.setData(data);
 
		    }
 
 
	     }

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Quote:

---

Originally Posted by curious725

...what if it is something ...like this

---

Well, before you began writing that TextHandler class, you had a plan to test it, right? I mean you must have had something in mind.

So...

In a brand new file, create a public class with a main() function that does whatever it is that you had in mind.

Maybe something like:

Code java:

---

//
// File Z.java or TestTextHandler.java or whatever name you want for this test class
//
// May have import statements...
//
public class Z  // Or TestTextHandler or whatever name you want for this test class
{
 
    public static void main(String [] args)
    {
        // May have "local" variables used in main()
 
        // Create a TextHandler object and whatever
        // other objects you are going to access from
        // main()
 
        // Do stuff with the TextHandler object and whatever
        // other things you need to deal with.
 
    } // End of main()
 
    // May have static data members and methods and inner
    // classes, etc., etc., etc. used in this test class
 
} // End class definition

---

Cheers!

Z

Also posted at Create a test class (main method) to start(run) the class in Java - Dev Shed

Your answer is better.Thank you