java静态方法无法在实体类中

Question

在下面代码的主函数中 的 MGragh.showGragh(gragh); 处为啥不能通过实体类调用静态方法。

import java.util.Arrays;

public class FloydAlgorithm {

    public static void main(String[] args) {
        char[] data = {'A','B','C','D','E','F','G'};
        int[][] weight = {{10000,5,7,10000,10000,10000,2},
                {5,10000,10000,9,10000,10000,3},
                {7,10000,10000,10000,8,10000,10000},
                {10000,9,10000,10000,10000,4,10000},
                {10000,10000,8,10000,10000,5,4},
                {10000,10000,10000,4,5,10000,6},
                {2,3,10000,10000,4,6,10000}};
        MGragh gragh = new MGragh(data, weight);
        MGragh.showGragh(gragh);
        FloydAlgorithm floydAlgorithm = new FloydAlgorithm();
        floydAlgorithm.floyd(gragh);
        MGragh.showGragh(gragh);
    }
    public void floyd(MGragh gragh) {
        int verx = gragh.verx;
        int i,j,k;
        for(k=0;k<verx;k++) {
            for(i=0;i<verx;i++) {
                for(j=0;j<verx;j++) {
                    if(gragh.weight[i][j] > (gragh.weight[i][k] + gragh.weight[k][j])) {
                        gragh.weight[i][j] = (gragh.weight[i][k] + gragh.weight[k][j]);
                    }
                }
            }
        }
    }
}
class MGragh {
    int verx;//表示图的节点个数
    char[] data ;//存放节点数据
    int[][] weight;//存放边，就是我们的邻接矩阵

    public MGragh(int verx) {
        data = new char[verx];
        weight = new int[verx][verx];
    }
    public MGragh(char[] data, int[][] weight) {
        this.verx = data.length;
        this.data = new char[this.verx];
        this.weight = new int[this.verx][this.verx];
        int i,j;
        for (i=0;i<this.verx;i++) {
            this.data[i] = data[i];
            for(j=0;j<verx;j++) {
                this.weight[i][j] = weight[i][j];
            }
        }
    }
    public static void showGragh(MGragh gragh) {
        for(int[] row : gragh.weight) {
            System.out.println(Arrays.toString(row));
        }
    }
}

Answer 1

运行正常啊