java - 出现语法错误，插入 "VariableDeclarators"来完成 LocalVariableDeclaration

Question

public class Water {
    private Graphic graphic;
    private float speed;
    private float distanceTraveled;

    public Water(float x, float y, float direction) 
    {
        speed = 0.7f;

        graphic = new Graphic();
        graphic.setType("WATER");   

        graphic.setX(x);
        graphic.setY(y);

        direction = graphic.getDirection(); //direction from Hero as water is fired
    }
    public Water update(int time) 
    {
        graphic.draw();
        return Water.this;
        distanceTraveled; // this is where the error occured...
    }
}

当我尝试调用 distanceTraveled 时，收到错误如下:

Syntax error, insert "VariableDeclarators" to complete LocalVariableDeclaration

Answer 1

要使语法错误消失并为 distanceTraveled 赋值，请修改方法 public Water update(int time)，如下所示:

public Water update(int time) {
    graphic.draw();
    distanceTraveled = 1; // assign a value before returning
    return Water.this;
}

也许您应该阅读一些有关 Java 的内容并学习一些教程，因为这是非常基本的内容(至少如果我没有理解错的话)。