Question

public static void main(String [] args)
{

//初始化数组

    double[][] results = new double[7][6];

//附加原始方法

    Catapult[][] data = new Catapult[7][6];

//打印标题

    printHeading();

// For-loop将数据输入原始方法

    for (int i = 0; i <= 6; i++)
    {
       for (int j = 0; j < 6; j++)
       {
           data[i][j] = new Catapult((double) (i + 5) * 5.0, (double) (j + 4) * 5.0);
           data[i][j].convertDegreesToRadians();
           data[i][j].convertMPHToMetersPerSec();
           System.out.println();
           System.out.println(data[i][0] + "" + data[i][j] + "" +  data[i][j+1] + ""            + data[i][j+2] + data[i][j+3] + " " +  data[i][j+4] + " " +  data[i][j+5]);
        }
    }

每当我尝试打印时，值都为null。如何在2d数组中正确打印i和j的值？

Answer 1

这样的东西？

for (int i = 0; i <= 6; i++)
  {
     for (int j = 0; j < 6; j++)
     {
         data[i][j] = new Catapult((double) (i + 5) * 5.0, (double) (j + 4) * 5.0);
         data[i][j].convertDegreesToRadians();
         data[i][j].convertMPHToMetersPerSec();
         System.out.print(data[i][j] + " ");
      }
      System.out.println();
  }

希望有所帮助

如何将2D数组打印到终端窗口

1 个答案: