在 Java 中创建动态 2D 矩阵 [英] Creating a dynamic 2D matrix in Java

问题描述

我想要一个动态矩阵，未知的行数和列数，通过单击按钮来填充它.但是还有更多:我不想添加整行，但一次只添加一个单元格，单击= 添加一个单元格.当然不是随机的:第一行的第一个单元格，第一行的第二个单元格......然后第二行的相同......

I want a dynamic matrix, number rows and columns unkonw, filling it by clicking on a button. Bu there is more: I don't want to add entire rows, but just one cell at the time, one click = one cell added. Of course not randomly : 1st cell of 1st row, 2nd cell of 1st row... and then the same of the 2nd row and so one...

我知道 UJMP、ArrayList，但这不是我想要的.请准确回答，提前谢谢.

I know about UJMP, ArrayList, but it's not quite what I'm looking for. Please be accurate on your answer, thank you in advance.

推荐答案

使用这个:

List<List<Integer>> dynamicMatrix = new ArrayList<List<Integer>>();

dynamicMatrix.add(new ArrayList<Integer>());
dynamicMatrix.add(new ArrayList<Integer>());
dynamicMatrix.add(new ArrayList<Integer>());

dynamicMatrix.get(0).add(6);
dynamicMatrix.get(0).add(7);
dynamicMatrix.get(0).add(8);

System.out.println(dynamicMatrix.get(0).get(0)); // 6
System.out.println(dynamicMatrix.get(0).get(1)); // 7
System.out.println(dynamicMatrix.get(0).get(2)); // 8

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