Question

I’m trying to find a similar or equivalent data collection used in C# DataRow class, which lets me choose the column name and row index.

Is there anything similar to this that can be used in Java?

Answer 1

This is somewhat similar to Etienne de Martel’s answer, but I would strongly recommend using a Map of sorts. A HashMap is almost certainly he best way.

I would first make a 2D array of values, for distinguishing purposes, I’ll call them Doubles:

Double[][] values = new Double[colNum][rowNum];

I would then for each column name map an integer to it:

Map <String, Integer> map = new HashMap<String, Integer>();
map.add("Column_0_Name",0);
map.add("Column_1_Name",1);
map.add("Column_2_Name",2);
map.add("Column_3_Name",3);
//...
map.add("Column_(colNum-1)_Name",colNum-1);

Then using these two together, I would create a function.

public double getValue(String columnName, int row){
 int colNum = map.get(columnName);
 return values[colNum][row];
}