java - 无法从静态上下文中引用非静态方法 (Java)

Question

这个问题已经有答案了:

Calling Non-Static Method In Static Method In Java [duplicate] (14 个回答)

已关闭 9 年前。

我是编程新手，并且在从 ant 类调用我的底层类时，不断发现无法从静态上下文中引用非静态方法。我已经删除了所有静态数据，但仍然收到此错误，如果有人可以指出我正确的方向或让我知道问题是什么，那就太好了，谢谢。

public class Ant {

    public final int RED = 0, BLUE = 1, NORTH = 0, 
            EAST = 1, SOUTH = 2, WEST = 3;
    public int color;

    public Ant(int size, int dir) {  
        size = size;
        dir = startDir;
        floor floor = new floor(size);
    }

    public int getRow() {
       return row; 
    }

    public int getCol() {
        return col;
    }

    public void makeMoves(int numMoves, int dir) {
        final int[][] offSet = {/* NORTH  */ {-1, 0},
                               /* EAST   */  {0, 1},
                               /* SOUTH  */  {1, 0},
                               /* WEST   */  {0,-1}};

        final int[][] newDir = {/* NORTH  */ {WEST, EAST},
                               /* EAST   */  {NORTH, SOUTH},
                               /* SOUTH  */  {EAST, WEST},
                               /* WEST   */  {SOUTH, NORTH}};
        //set start row, col, and direction
        row = col = size/2;

        for(int move = 1; move <= numMoves; move ++) {
            //make a move based on direction
            row = row + offSet[dir][0];
            col = col + offSet[dir][1];

            //turn based on color of new tile and direction
            color = floor.getTileColor(row, col);
            dir = newDir[dir][color];

            //change color of current tile
            floor.changeTileColor(row, col);
        }      
    }//End of makeMoves
}//End Ant class

public class floor {    
    int [][] grid;

    public floor(int size) {
        grid = new int[size][size];
    }

    public int getTileColor(int row, int col) {
        return grid[row][col];
    }

    public void changeTileColor(int row, int col) {
        int color = grid[row][col];
    }
}

Answer 1

由于其他原因该代码无法编译。例如，在此构造函数中，未定义 startDir。虽然定义了大小，但它没有任何作用。它将参数大小分配给自己。你真的想要 this.size = size;

public Ant(int size, int dir)
    {  
        size = size;
        dir = startDir;

此外，row 和 col 没有在任何地方定义。如果您收到有关静态的错误，我想知道您是否正在编译旧代码。