无法获得基本的工作方法

Question

谁能告诉我为什么getSpeed方法不起作用？

每当我将鼠标悬停在方法上时，都会得到：

插入;
非法修饰符语法错误，请在令牌上插入[]语法错误

public class Tanks {

private String TankName;
private int TankModel;
private int CrewNumber;
private double Speed;
private int TurretSpeed;


Tanks (String name, int model, int crew, double speed, int turretspeed){

    this.TankName = name;
    this.TankModel = model;
    this.CrewNumber = crew;
    this.Speed = speed;
    this.TurretSpeed = turretspeed;

}

public static void main(String[] args) {

    Tanks merkava = new Tanks ("MERKAVA", 1, 5, 56.64, 67);
    Tanks judge = new Tanks ("JUDGE", 2, 6, 66.66, 68); 


    public double getSpeed() {
        return Speed;
    }

    System.out.println(merkava.TankName+ " "+merkava.TankModel+" "+merkava.CrewNumber+" "+merkava.Speed+" "+merkava.TurretSpeed);
    System.out.println(judge.TankName+ " "+judge.TankModel+" "+judge.CrewNumber+" "+judge.Speed+" "+judge.TurretSpeed);

} 
}

Answer 1

您的main方法包含以下方法。

 public double getSpeed() {
        return Speed;
    }

请将其移至“ Tanks课程。

以下应该工作：

public class Tanks {

private String TankName;
private int TankModel;
private int CrewNumber;
private double Speed;
private int TurretSpeed;

Tanks(String name, int model, int crew, double speed, int turretspeed) {

    this.TankName = name;
    this.TankModel = model;
    this.CrewNumber = crew;
    this.Speed = speed;
    this.TurretSpeed = turretspeed;

}

public double getSpeed() {
    return Speed;
}

public static void main(String[] args) {

    Tanks merkava = new Tanks("MERKAVA", 1, 5, 56.64, 67);
    Tanks judge = new Tanks("JUDGE", 2, 6, 66.66, 68);

    System.out.println(merkava.TankName + " " + merkava.TankModel + " " + merkava.CrewNumber + " " + merkava.Speed
            + " " + merkava.TurretSpeed);
    System.out.println(judge.TankName + " " + judge.TankModel + " " + judge.CrewNumber + " " + judge.Speed + " "
            + judge.TurretSpeed);

}
}

Answer 2

如果您已经完成了一些基本的Java课程，您将知道通过在另一个函数（ main ）中定义一个方法（在本例中为getSpeed() ）是错误的。