Thread: Learning to code and this is the first thing I put together from what I learned, I don't know how to fix the problem!

import java.util.Scanner;

class Robot {

public void speakreturn(String mainmenu) {
System.out.println("What can I do for you?");
}
public void grab(String text) {
System.out.println("Grabbing " + text + " now!");
}

public void jump(int height) {
System.out.println("Jumping " + height + "m" + " high!");
}

public void move(String direction) {
System.out.println("Moving " + direction);
}


}


public class Robo {

public static void main(String[] args) {

Robot kush = new Robot();

Scanner interactive = new Scanner(System.in);

System.out.println("Hello, I'm Kush, What's your name?");

String name = interactive.nextLine();

System.out.println("Nice to meet you " + name +".");

while (1>0) {


String mainmenu = "What can I do for you " + name;

kush.speakreturn(mainmenu);

String action = interactive.nextLine();

if (action == "move") {
kush.move();
}

else if(action == "grab") {
kush.grab();
}

else (action == "menu")
kush.speakreturn(mainmenu);


kush.action(grab);

kush.action(speakreturn);

int measurements = interactive.nextInt();

kush.jump(measurements);


}
}
}

}

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Sorry about that! I had no clue. My question is why won't my program work when I want to be able to have a user input for an object to respond and after each response I wanted it to loop back to the "What can I do for you?" line. I can't tell where I went wrong. I get these errors (Lines 47, 51, 54): The method move(String) in the type Robot is not applicable for the arguments (), The method grab(String) in the type Robot is not applicable for the arguments (), The method menu(String) in the type Robot is not applicable for the arguments (). Also there is line 18 problem: The method println(String) in the type PrintStream is not applicable for the arguments (String, String).

import java.util.Scanner;
 
class Robot {
 
	public void speakreturn(String mainmenu) {
		System.out.println("What can I do for you?");
	}
	public void grab(String text) {
		System.out.println("Grabbing " + text + " now!");
	}
 
	public void jump(int height) {
		System.out.println("Jumping " + height + "m" + " high!");
	}
 
	public void move(String direction) {
		System.out.println("Moving " + direction, " about " + distance + "m.");
	}
 
 
}
 
 
public class Robo {
 
	public static void main(String[] args) {
 
		Robot kush = new Robot();
 
		Scanner interactive = new Scanner(System.in);
 
			System.out.println("Hello, I'm Kush, What's your name?");
 
			String name = interactive.nextLine();
 
			System.out.println("Nice to meet you " + name +".");
 
			while (1>0) {
 
 
				String mainmenu = "What can I do for you " + name;
 
					kush.speakreturn(mainmenu);
 
					String action = interactive.nextLine();
 
					if (action == "move") {
						kush.move();
					}
 
					else if(action == "grab") {
						kush.grab();
					}
 
					else (action == "menu")
						kush.speakreturn(mainmenu);
 
			}
			}
		}
 
	}

You're calling the methods wrong. The methods require a String argument, as in:

kush.move( "up" );

I have no idea what the argument should be, so refer to the API for the move() and other methods to determine that.

Further. do not compare Strings using the '==' operator. Use the equals() method instead:

if (action.equals( "move" ) )

For your last error, note that the comma separates the arguments into two which the println() method does not expect. (See how the error messages make sense now?) If you want to include a comma character in the output, include it inside the quotes:

System.out.println("Moving " + direction " , about " + distance + "m.");

Thank you very much! I have a lot to research!

I missed a '+' in my change to your statement:

System.out.println("Moving " + direction + " , about " + distance + "m.");

I finally fixed most of the problems but I cannot fix the distance one, I moved the comma around but it still doesn't work. I am trying to have a (String, int). It's on line 20: The method println(String)in the type PrintStrea, is not applicable for the arguments (String, String). Also on line 41 I have the robot restart the loop from that point and I have a single statement of kush.speakreturn(mainmenu); but it comes out twice when it restarts the loop. Thanks in advance! I'm loving this!

 
import java.util.Scanner;
 
class Robot {
 
	String text;
 
	public void speakreturn(String mainmenu) {
		System.out.println("What can I do for you?");
	}
 
	public void grab(String text) {
		System.out.println("Grabbing " + text + " now!");
	}
 
	public void jump(int height) {
		System.out.println("Jumping " + height + "m" + " high!");
	}
 
	public void move(String direction, int distance) {
		System.out.println("Moving " + direction, "about" + distance + "m.");
	}
 
}
 
public class Robo {
 
	public static void main(String[] args) {
 
		Robot kush = new Robot();
 
		Scanner interactive = new Scanner(System.in);
 
			System.out.println("Hello, I'm Kush, What's your name?");
 
			String name = interactive.nextLine();
 
			System.out.println("Nice to meet you " + name +".");
 
			while (1>0) {		
 
				String mainmenu = "What can I do for you " + name;
 
					kush.speakreturn(mainmenu);
 
					String action = interactive.nextLine();
 
					if (action.equals("move")) {
 
						System.out.println("Move which direction?");
 
						String direction = interactive.nextLine();
 
						System.out.println("How far should I move?");
 
						int distance = interactive.nextInt();
 
						kush.move(direction, distance);
					}
 
					else if(action.equals("grab")) {
 
						System.out.println("What should I grab?");
 
						String text = interactive.nextLine();
 
						kush.grab(text);
					}
 
					else if(action.equals( "menu")) {
 
						System.out.println("Returning to main menu.");
 
					}		
 
 
					else if(action.equals("jump")) {
 
						System.out.println("How high?");
 
						int height = interactive.nextInt();
 
						kush.jump(height);
 
					}
 
 
			}
		}
}

See my correction above. (Post #7).

Oh man, lots of love and respect! Thanks for the quick responses too. So amazing! Thanks again Greg!