不是一个封闭的Java类 [英] Is not an enclosing class Java

问题描述

我正在尝试制作一个俄罗斯方块游戏，当我尝试创建一个对象时，我得到形状不是一个封闭的类

I'm trying to make a tetris game and I'm getting "Shape is not an enclosing class" when I try to create an object

public class Test {
    public static void main(String[] args) {
        Shape s = new Shape.ZShape();
    }
}

我正在为每个形状使用内部类。这是我的代码的一部分

I'm using inner classes for each shape. Here's part of my code

public class Shape {

    private String shape;
    private int[][] coords;
    private int[][] noShapeCoords = { { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } };
    private int[][] zShapeCoords = { { 0, -1 }, { 0, 0 }, { -1, 0 }, { -1, 1 } };
    private int[][] sShapeCoords = { { 0, -1 }, { 0, 0 }, { 1, 0 }, { 1, 1 } };
    private int[][] lineShapeCoords = { { 0, -1 }, { 0, 0 }, { 0, 1 }, { 0, 2 } };
    private int[][] tShapeCoords = { { -1, 0 }, { 0, 0 }, { 1, 0 }, { 0, 1 } };
    private int[][] squareShapeCoords = { { 0, 0 }, { 1, 0 }, { 0, 1 }, { 1, 1 } };
    private int[][] lShapeCoords = { { -1, -1 }, { 0, -1 }, { 0, 0 }, { 0, 1 } };
    private int[][] mirroredLShapeCoords = { { 1, -1 }, { 0, -1 }, { 0, 0 }, { 0, 1 } };

    public Shape(){
        int[][] coords =  noShapeCoords;
        shape = "NoShape";
    }

    class ZShape {
        int[][] coords =  zShapeCoords;
        String shape = "ZShape";
    }

    class SShape {
        int[][] coords = sShapeCoords;
        String shape = "SShape";
    }

 //etc
}

我做错了什么？

推荐答案

ZShape 不是静态的，所以它需要一个外部类的实例。

ZShape is not static so it requires an instance of the outer class.

最简单的解决方案是使ZShape和任何嵌套类 static 如果你可以。

The simplest solution is to make ZShape and any nested class static if you can.

我还会创建任何字段 final 或 static final 你也可以。

I would also make any fields final or static final that you can as well.

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