java - 在另一个类中使用主类中的对象

Question

所以我们正在尝试创建一个人工智能机器人，我发现 Java 并不像我想象的那么容易。我想做的是从另一个类获取一个对象。

主类:

    package main;


   import lejos.hardware.Brick;
   import lejos.hardware.BrickFinder;
   import lejos.hardware.motor.EV3LargeRegulatedMotor;
   import lejos.robotics.RegulatedMotor;
   import movement.Forward;

   public final class Runner {


    public static void main(String[] args) {
        //create brick
        Brick brick = BrickFinder.getDefault();

        // create motors
        RegulatedMotor left = new EV3LargeRegulatedMotor(brick.getPort("A"));
        RegulatedMotor right = new EV3LargeRegulatedMotor(brick.getPort("D"));

        //initialize motors
        left.setAcceleration(400);
        right.setAcceleration(400);

        left.setSpeed(400);
        right.setSpeed(400);



    Forward forward = new Forward();
        forward.moveForward();

    }



}

但另一个类是这个

    package movement;


   import lejos.utility.Delay;
   import main.Runner;

   public class Forward{

    public int speed;



    public void moveForward(){
        //moves forward for 5 seconds, then floats until motor stops and then closes the motors
            left.backward();
            right.backward();

            Delay.msDelay(5000);

            left.flt();
            right.flt();

            left.close();
            right.close();



    }

}

我想使用 left 和 right 对象来制作一个可以向前移动的方法。

Answer 1

您的 Forward 类显然需要对两个电机实例的引用。您应该在构建时转发(没有双关语)它们:

public class Forward {
    private final RegulatedMotor left;
    private final RegulatedMotor right;

    public Forward(RegulatedMotor left, RegulatedMotor right) {
        this.left = left;
        this.right = right;
    }

    public void moveForward() { ... }
}

您的 forward 方法现在可以访问它们。现在必须按如下方式构建这样的 Forward:

Forward forward = new Forward(left, right);