I want to clear my custom TableModel and get the following exception:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: com.Test.gui.results.ResultTableModel cannot be cast to javax.swing.table.DefaultTableModel
I want to clear my model like that:
DefaultTableModel model = (DefaultTableModel) resultTable.getModel();
model.setRowCount(0);
That is my ResultsTableModel
:
public class ResultTableModel extends AbstractTableModel {
/**
* UUID
*/
private static final long serialVersionUID = -8928042813952799089L;
private String[] columnNames = {"Customer", "Test1"};
private List<TestData> resultList = new ArrayList<TestData>();
private TestData rs;
public ResultTableModel(List<TestData> resultList){
this.resultList=resultList;
}
@Override
public int getRowCount() {
return resultList.size();
}
/**
* get Value at
*/
public Object getValueAt(int row, int col) {
TestData r = resultList.get(row);
switch (col) {
case 0:
return r.getCustomer();
case 1:
return r.getEquity();
case 2:
return r.getCyclicalRiskMarketAvg();
case 3:
return r.getDscr_1();
case 4:
return r.getDscr_2();
case 5:
return r.getDscr_3();
case 6:
return r.getDscr_4();
case 7:
return r.getDscr_5();
case 8:
return r.getDscr_6();
case 9:
return r.getDscr_7();
case 10:
return r.getDscr_8();
case 11:
return r.getDscr_9();
case 12:
return r.getDscr_10();
case 13:
return r.getLtv_1();
case 14:
return r.getLtv_2();
case 15:
return r.getLtv_3();
case 16:
return r.getLtv_4();
case 17:
return r.getLtv_5();
case 18:
return r.getLtv_6();
case 19:
return r.getLtv_7();
case 20:
return r.getLtv_8();
case 21:
return r.getLtv_9();
case 22:
return r.getLtv_10();
default:
break;
}
fireTableDataChanged();
return null;
}
public void setTestData(TestData rd){
resultList.add(rd);
fireTableRowsInserted(resultList.size()-1, resultList.size()-1);
}
@Override
public String getColumnName(int index) {
return columnNames[index];
}
@Override
public int getColumnCount() {
return columnNames.length;
}
/**
* @return the columnNames
*/
public String[] getColumnNames() {
return columnNames;
}
/**
* @param columnNames the columnNames to set
*/
public void setColumnNames(String[] columnNames) {
this.columnNames = columnNames;
}
/**
* checks if the cells are editable
*/
public boolean isCellEditable(int row, int col) {
return false;
}
/**
* @return the resultList
*/
public List<TestData> getResultList() {
return resultList;
}
/**
* @param resultList the resultList to set
*/
public void setResultList(List<TestData> resultList) {
this.resultList = resultList;
}
/**
*
* @return
*/
public TestData getRs() {
return rs;
}
/**
* @param rs the rs to set
*/
public void setRs(TestData rs) {
this.rs = rs;
}
}
I understand that my cast does not work. However, I would like to clear my model.
Any recommendation how to clear my model?
I appreciate your answer!
UPDATE
I added this method to my TableModel
:
public void clear() {
for (int i = 0; i < resultList.size(); i++) {
resultList.remove(i);
}
fireTableRowsDeleted(0, getRowCount());
}
However, now when I click my button only some rows get deleted, which looks extremely random to me.
UPDATE 2
This solution works:
public void clear() {
resultList.clear();
fireTableRowsDeleted(0, getRowCount());
}
The message is extremely clear. Your table has a model of type ResultTableModel, which extends AbstractTableModel. You get the model, and cast it to DefaultTableModel. But it's not a DefaultTableModel. It's a ResultTableModel. So you get an exception.
That's like taking a bicycle and pretend it's a plane. It's not a plane, so there's no way you can make it fly.