Thread: Issue With Methods Between Classes

Hello! I'm trying to solve this issue, my code is below

// CLASS ONE: METHODS ONLY
package project2;
import java.lang.Math;

public class PromptBank {

String [] question;
String [] statement;

public PromptBank(){
question = new String[3]; //initialize your array to the correct length to match your number of questions you populate it with
statement = new String[3]; //initialize your array to the correct length to match your number of questions you populate it with

}

public void populateStatementsArray(){
statement[0] = "Tell me more about BLANK1 and BLANK2";
statement[1] = "BLANK1 seems important to you, so does BLANK2. Please tell me more.";
statement[2] = "BLANK1 and BLANK2 seem to be on your mind. Let's talk about it.";
}

public void populateQuestionsArray(){
question[0] = "Is there anything else about BLANK1 and BLANK2?";
question[1] = "Does BLANK1 bother you? How about BLANK2?";
question[2] = "Are BLANK1 and BLANK2 things you think about often?";
}

public String getRandomStatement(){ // the goal here is to print a random statement from the statement array when this method is called
double range = 2 - 0 + 1; //max - min + 1
double random = (Math.random() * range) + 0;
String answer = statement[(int)random];

return answer;
}
}

//CLASS TWO: MAIN METHOD
package project2;
import java.util.Scanner;

public class Eliza {
public static void main(String [] args) {
String name = "";
String input = " ";
String output = " ";

// Greetings and asking for name
System.out.println("Hello, my name is Eliza. What is your name?");

Scanner scnr = new Scanner(System.in);
name = scnr.nextLine();

//What's on your mind?
System.out.println("Hello, " + name + ". Tell me what is on your mind today in 1 sentence.");
input = scnr.nextLine();

// ***** PROBLEM!! - For some reason when I get here, the console just prints "null" I tried taking out the random function from the method thinking it
//was wrong but it still kept returning null.
PromptBank answerobj = new PromptBank();
output = answerobj.getRandomStatement();
System.out.println(output);

}

}

Thanks so much in advance!

need call answerobj.populateStatementsArray(); first before output = answerobj.getRandomStatement();

// ***** PROBLEM!! - For some reason when I get here, the console just prints "null" I tried taking out the random function from the method thinking it 
        //was wrong but it still kept returning null. 
        PromptBank answerobj = new PromptBank();
 
        answerobj.populateStatementsArray();
 
        output = answerobj.getRandomStatement();
        System.out.println(output);

whole code

package com.tool.util;
 
import java.lang.Math;
 
public class PromptBank {
 
    String[] question;
    String[] statement;
 
    public PromptBank() {
        question = new String[3]; //initialize your array to the correct length to match your number of questions you populate it with
        statement = new String[3]; //initialize your array to the correct length to match your number of questions you populate it with
 
    }
 
    public void populateStatementsArray() {
        statement[0] = "Tell me more about BLANK1 and BLANK2";
        statement[1] = "BLANK1 seems important to you, so does BLANK2. Please tell me more.";
        statement[2] = "BLANK1 and BLANK2 seem to be on your mind. Let's talk about it.";
    }
 
    public void populateQuestionsArray() {
        question[0] = "Is there anything else about BLANK1 and BLANK2?";
        question[1] = "Does BLANK1 bother you? How about BLANK2?";
        question[2] = "Are BLANK1 and BLANK2 things you think about often?";
    }
 
    public String getRandomStatement() { // the goal here is to print a random statement from the statement array when this method is called
        double range = 2 - 0 + 1; //max - min + 1
        double random = (Math.random() * range) + 0;
        String answer = statement[(int) random];
 
        return answer;
    }
}

package com.tool.util;
 
import java.util.Scanner;
 
public class Eliza {
    public static void main(String[] args) {
        String name = "";
        String input = " ";
        String output = " ";
 
        // Greetings and asking for name
        System.out.println("Hello, my name is Eliza. What is your name?");
 
        Scanner scnr = new Scanner(System.in);
        name = scnr.nextLine();
 
        //What's on your mind?
        System.out.println("Hello, " + name + ". Tell me what is on your mind today in 1 sentence.");
        input = scnr.nextLine();
 
        // ***** PROBLEM!! - For some reason when I get here, the console just prints "null" I tried taking out the random function from the method thinking it 
        //was wrong but it still kept returning null. 
        PromptBank answerobj = new PromptBank();
 
        answerobj.populateStatementsArray();
 
        output = answerobj.getRandomStatement();
        System.out.println(output);
 
    }
 
}