How to represent complex class in an AbstractTableModel?
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26-09-2019 - |
문제
I have this class:
public abstract class Directory {
protected int id;
protected File path;
protected LinkedList<Filter> filters;
protected LinkedList<File> files;
protected int wildcard;
public static int numCols = 3;
/* other things */
}
And I wrote this table model:
public class DirectoryListTableModel extends AbstractTableModel {
private static final long serialVersionUID = 1L;
private LinkedList<Directory> datalist;
private String[] columnNames= {"ID", "Directory", "Wildcard", "Filters"};
public DirectoryListTableModel(){
}
public void setDatalist(LinkedList<Directory> temp){
this.datalist = temp;
}
public void showElement(){
fireTableRowsInserted(this.datalist.size()-2,this.datalist.size()-2);
}
public LinkedList<Directory> getDatalist(){
return (LinkedList<Directory>) this.datalist.clone();
}
@Override
public String getColumnName(int column) {
return this.columnNames[column];
}
@Override
public int getColumnCount() {
return Directory.numCols;
}
@Override
public int getRowCount() {
return this.datalist.size();
}
@Override
public Object getValueAt(int row, int col) {
Directory temp = this.datalist.get(row);
switch(col){
case 0:
return temp.getId();
case 1:
return temp.getPath();
case 2:
return temp.getWildcard();
default:
return null;
}
}
}
As you can see I have a LinkedList<Filter>
that I would like too show as a simple string. How can I do that?
해결책
e.g.:
case 3:
return temp.getFilters().toString();
Note:
- Use the interface (e.g. List) rather than the implementation (LinkedList) when declaring fields (if you don't have a good reason to do otherwise).
- ArrayList has a better performance than LinkedList in most cases (e.g. such as access by index)
- Also override getColumnClass
- Keep your fields private
- setDatalist: fireTableDataChanged
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