how to invoke java program from matlab

I have to run following code in java and invoke this class in matlab. Classpath is set as recommended.

class HelloWorld
{
        public String Hello()
        {
            String helloWorld="Hello World!";
            return helloWorld;
        }
}

Now, as per guided i try to create instance obj in Matlab, with following command:

o = HelloWorld;

Here I get following err:

       No constructor 'HelloWorld' with matching signature found.

The next command indicated it this:

output = o.hello;

which wouldnt work unless instance is created. Plz help how to fix this instance creation.

Answer 1

[Neha]

I modified this code as follows, by including package:

package pkg1;

public class HelloWorld 
{
  public HelloWorld()
  {
    HelloWorld h = HelloWorld();  
  }
  public String hello()
  {
    String helloWorld = "HelloWorld!";
    return helloWorld;
  }
}

Now following instructions executed:: |--> keep this file in a package called pkg1. --> Run and compile as an ordinary Java Package File, so as to create .class files. --> now your package will be stored in matlab work folder. --> so your package path is C:\Matlab\Work\pkg1 --> ------------------------------ | Now i executed following function on matlab command window:

import pkg1.*;

obj = h;
str1 = obj.hello();

Yet i have same error as mentioned above.