`静态`和非静态`字段可在java Android中获得更好的性能

我在Android上用openGL 2D开发游戏

因为我的视图很复杂，同时包含300-400个对象（游戏循环），所以获得性能级别是非常重要的

我非常了解java中的

静态

和

非静态

字段：

private final static int NUMBER = 10;

及

我的问题不是封装（作为OO），而是性能

性能方面最好使用的是，

静态

或

非静态

字段

其思想是，对于我的大多数逻辑，我使用诸如

float/int

之类的原语

我为我的所有“视图”创建了泛型超类，该类必须在性能范围内更有效：

下面是一个例子：

    /** Sprite sheet definition */
private final int SPRITE_WIDTH = 4;
private final int SPRITE_HEIGHT = 4;

private float mScreenWidth, mScreenHeight, wRatio, hRatio;
private int mFrame = 0;
private int mSwitcher = 0;
private final int TEXTURE_COUNT = 1; // for sprite sheet we use 1 image all the time.
private int[] textures = new int[TEXTURE_COUNT]; // frame animation

protected FloatBuffer vertexBuffer;

private final ESpriteDirection mDirection = ESpriteDirection.TOP_TO_DOWN_LEFT_TO_RIGHT;


public float x, y, initPos, finalPos, initSpeed, currentPos;

private ByteBuffer bb1;

private final int TOTAL_IMAGE_COUNT_IN_SPRITE = SPRITE_WIDTH * SPRITE_HEIGHT;

private FloatBuffer[] floatBufferArray = new FloatBuffer[TOTAL_IMAGE_COUNT_IN_SPRITE];

private float xOffset = 1.0f/SPRITE_WIDTH;
private float yOffset = 1.0f/SPRITE_HEIGHT;




private float vertices[] = {            
        0.0f,3.0f,0.0f,
        0.0f,0.0f,0.0f,                 
        3.0f,3.0f,0.0f,
        3.0f,0.0f,0.0f  
};


private float storage[][] = new float[TOTAL_IMAGE_COUNT_IN_SPRITE][];
private int[] sprite_X_Indexes = new int[SPRITE_WIDTH];//{1,2,3,4}; 
private int[] sprite_Y_Indexes = new int[SPRITE_WIDTH];//{1,2,3,4};

我可以猜，对于同一类的多次初始化

静态
字段更好，嗯

谢谢，
从性能角度来看，一旦编译了代码，就应该没有什么差别了，因为静态字段和（单个）非静态字段都已转换为一个内存位置

声明字段static可以在编译器级别提供一些优化可能性。另一方面，通常静态对象可能不“接近”内存中的实例数据，这对缓存性能不利

一般来说，这不是你应该花时间的地方，除非你已经用尽了所有的算法优化，只有在您知道这实际上是您浪费时间的地方之后，我建议您避免重复进行会使您的设计更糟糕的优化，除非您分析了应用程序并发现问题依赖于对该字段的访问。静态与性能无关。如果字段属于实例，则它不能是静态的。如果它属于一个类，它必须是静态的。你指的是静态/非静态的还是最终/非最终的？在您的示例中，这两个字段都是静态的。示例中的两个变量都是
静态的
@adenoyelle，抱歉，已修复
    /** Sprite sheet definition */
private final int SPRITE_WIDTH = 4;
private final int SPRITE_HEIGHT = 4;

private float mScreenWidth, mScreenHeight, wRatio, hRatio;
private int mFrame = 0;
private int mSwitcher = 0;
private final int TEXTURE_COUNT = 1; // for sprite sheet we use 1 image all the time.
private int[] textures = new int[TEXTURE_COUNT]; // frame animation

protected FloatBuffer vertexBuffer;

private final ESpriteDirection mDirection = ESpriteDirection.TOP_TO_DOWN_LEFT_TO_RIGHT;


public float x, y, initPos, finalPos, initSpeed, currentPos;

private ByteBuffer bb1;

private final int TOTAL_IMAGE_COUNT_IN_SPRITE = SPRITE_WIDTH * SPRITE_HEIGHT;

private FloatBuffer[] floatBufferArray = new FloatBuffer[TOTAL_IMAGE_COUNT_IN_SPRITE];

private float xOffset = 1.0f/SPRITE_WIDTH;
private float yOffset = 1.0f/SPRITE_HEIGHT;




private float vertices[] = {            
        0.0f,3.0f,0.0f,
        0.0f,0.0f,0.0f,                 
        3.0f,3.0f,0.0f,
        3.0f,0.0f,0.0f  
};


private float storage[][] = new float[TOTAL_IMAGE_COUNT_IN_SPRITE][];
private int[] sprite_X_Indexes = new int[SPRITE_WIDTH];//{1,2,3,4}; 
private int[] sprite_Y_Indexes = new int[SPRITE_WIDTH];//{1,2,3,4};