very simple doubt - declaring a method in the Interpreter

Hi

from the quickstart guide, I saw that I can declare methods just like this

>>
int addTwoNumbers( int a, int b ) {
    return a + b;
}

sum = addTwoNumbers( 5, 7 );  // 12
>>

and I saw I can declare variables and evaluate expressions using the
Interpreter just like this

>>
import bsh.Interpreter;

Interpreter i = new Interpreter();  // Construct an interpreter
i.set("foo", 5);                    // Set variables
i.set("date", new Date() );

Date date = (Date)i.get("date");    // retrieve a variable

// Eval a statement and get the result
i.eval("bar = foo*10");
System.out.println( i.get("bar") );
>>

now, my doubt is how can I declare a method using the Interpreter ?

TIA

[]

Leo K.

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