java - JAVA中模拟二维表的类

Question

public class table 
{
private int raw=0;
private int column=0;
private List<ArrayList<Integer>> TABLE ;
private static int COUNT_ELEMENTS_IN_RAW=0;
private static int COUNT_ELEMENTS_TOTAL=0;
private List<Integer> singleRaw ;
public table()
{
    TABLE = new ArrayList<ArrayList<Integer>>();
    singleRaw = new ArrayList<Integer>();
}
public void addELEMENT(Integer value)
{   
    if(!TABLE.equals(null))
    {

        singleRaw.addAll(TABLE.get(raw));
        singleRaw.add(value);
        COUNT_ELEMENTS_IN_RAW++;
        if(COUNT_ELEMENTS_IN_RAW%14==0)
        {
            raw++;
            COUNT_ELEMENTS_IN_RAW=0;
            COUNT_ELEMENTS_TOTAL++;
        }
    }
}
}

这里我试图模拟二维表(xy)，函数addELEMENT执行插入“表”的操作。 任何人都可以解释我为什么给我这个错误？

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at pt.iul.poo.games.table.addELEMENT(table.java:27)

Answer 1

你见过 Guava 的集合类型吗？包括？ Table ，它支持任何“行”类型和“列”类型的此用例。

Table<Integer, Integer, String> table = HashBasedTable.create();
table.put(0, 0, "A"); // row 0, column 0
table.put(0, 1, "B"); // row 0, column 1

// One element
final String value = table.get(0, 1); // "B"

// Column 0
final Collection<String> strs = table.column(0).values();

// Row 1
final Collection<String> strs = table.row(1).values();