table

**hirak1984** · Apr 11 '07, 01:03 PM

can you be a bit more elaborate, what technology are you using and what the problem actually is...

Originally posted by oll3i

i want to get the value of first column of selected row so i can remove the flower form a cart when somebody removes a row which means removing the first occurence of flower object from a map
cd u please help me?

**oll3i** · Apr 11 '07, 04:02 PM

I have a cart to which i add flowers bought by a client then the list of flowers is displayed in a table when i remove a row from a table i also need to remove that flower from a cart

Code:

package Zad21;






import javax.swing.*;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.table.AbstractTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.util.*;
import java.util.List;
 
public class Table extends JComponent{
	private JPanel thePanel;

	private JTable theTable;
	private LocalTableModel theTableModel;
	private AbstractAction theRemoveRowAction;
	private List<Row> theRows;
	String[] columnNames = {"Nazwa",
            "Ilosc",
            "Cena"};
	private class Row {
		private String theFirstField;
		private int theSecondField;
		private double theThirdField;
		public Row(String n,int i,double c) {
			theFirstField = n;
			theSecondField = i;
			theThirdField= c;
		}
 
		public String getFirstField() {
			return theFirstField;
		}
 
		public int getSecondField() {
			return theSecondField;
		}
		
		
		public double getThirdField() {
			return theThirdField;
		}
	}
 
public class LocalTableModel extends AbstractTableModel {

public String getColumnName(int column) {
			return columnNames[column];
		}
 
public Class getColumnClass(int c) {
	            return getValueAt(0, c).getClass();
	        }

 
public boolean isCellEditable(int rowIndex, int columnIndex) {
			return false;
}
 
public int getRowCount() {
			return theRows.size();
}
 
public int getColumnCount() {
			return 3;
}
 
public Object getValueAt(int rowIndex, int columnIndex) {
			Row row = theRows.get(rowIndex);
			if (columnIndex == 0) {
				return row.getFirstField();
			} else if(columnIndex == 1) {
				return row.getSecondField();
			} else {return row.getThirdField();}
		}
	}
 
public Table() {
		thePanel = new JPanel(new BorderLayout());
 
		JToolBar toolBar = new JToolBar();
		toolBar.setFloatable(false);
		
		theRemoveRowAction = new AbstractAction("Remove row") {
			public void actionPerformed(ActionEvent e) {
				removeRow();
			}
		};
		toolBar.add(theRemoveRowAction);
		
		thePanel.add(toolBar, BorderLayout.NORTH);
 
		theRows = new LinkedList<Row>();
		theTableModel = new LocalTableModel();
		theTable = new JTable(theTableModel);
		theTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
			public void valueChanged(ListSelectionEvent e) {
				validateSelection();
			}
		});
		thePanel.add(new JScrollPane(theTable), BorderLayout.CENTER);
		validateSelection();
		//reload();
	}
 
JPanel getPanel() {
		return thePanel;
	}
 
public void addRow(String nazwkaKwiata,int ilosc,double cena) {
		int size = theRows.size();
		for(int i=0;i<ilosc;i++){
		theRows.add(new Row(nazwkaKwiata, 1 ,cena));
		theTableModel.fireTableRowsInserted(size, size);
		}
	}
 
public void removeRow() {
		int index = theTable.getSelectedRow();
		if (index == -1) return;
		
		theRows.remove(index);
		theTableModel.fireTableRowsDeleted(index, index);
		index = Math.min(index, theRows.size() - 1);
		if (index >= 0) {
			theTable.getSelectionModel().setSelectionInterval(index, index);
		}
	}
 
public int GetIndexRowSelected(){return theTable.getSelectedRow();}


private void validateSelection() {
theRemoveRowAction.setEnabled(theTable.getSelectedRow() != -1);
	}

	
 
	
 
	
}

then in other class i have
String k=table.getValu eAt(rowindex,1) ;but eclipse says that the method getValueAt (int,int)is undefined for type Table

**hirak1984** · Apr 11 '07, 04:15 PM

you can do tht by using session as scope of the variable.
whenever you delete row invalidate the session.

Originally posted by oll3i

I have a cart to which i add flowers bought by a client then the list of flowers is displayed in a table when i remove a row from a table i also need to remove that flower from a cart

Code:

package Zad21;






import javax.swing.*;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.table.AbstractTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.util.*;
import java.util.List;
 
public class Table extends JComponent{
	private JPanel thePanel;

	private JTable theTable;
	private LocalTableModel theTableModel;
	private AbstractAction theRemoveRowAction;
	private List<Row> theRows;
	String[] columnNames = {"Nazwa",
            "Ilosc",
            "Cena"};
	private class Row {
		private String theFirstField;
		private int theSecondField;
		private double theThirdField;
		public Row(String n,int i,double c) {
			theFirstField = n;
			theSecondField = i;
			theThirdField= c;
		}
 
		public String getFirstField() {
			return theFirstField;
		}
 
		public int getSecondField() {
			return theSecondField;
		}
		
		
		public double getThirdField() {
			return theThirdField;
		}
	}
 
public class LocalTableModel extends AbstractTableModel {

public String getColumnName(int column) {
			return columnNames[column];
		}
 
public Class getColumnClass(int c) {
	            return getValueAt(0, c).getClass();
	        }

 
public boolean isCellEditable(int rowIndex, int columnIndex) {
			return false;
}
 
public int getRowCount() {
			return theRows.size();
}
 
public int getColumnCount() {
			return 3;
}
 
public Object getValueAt(int rowIndex, int columnIndex) {
			Row row = theRows.get(rowIndex);
			if (columnIndex == 0) {
				return row.getFirstField();
			} else if(columnIndex == 1) {
				return row.getSecondField();
			} else {return row.getThirdField();}
		}
	}
 
public Table() {
		thePanel = new JPanel(new BorderLayout());
 
		JToolBar toolBar = new JToolBar();
		toolBar.setFloatable(false);
		
		theRemoveRowAction = new AbstractAction("Remove row") {
			public void actionPerformed(ActionEvent e) {
				removeRow();
			}
		};
		toolBar.add(theRemoveRowAction);
		
		thePanel.add(toolBar, BorderLayout.NORTH);
 
		theRows = new LinkedList<Row>();
		theTableModel = new LocalTableModel();
		theTable = new JTable(theTableModel);
		theTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
			public void valueChanged(ListSelectionEvent e) {
				validateSelection();
			}
		});
		thePanel.add(new JScrollPane(theTable), BorderLayout.CENTER);
		validateSelection();
		//reload();
	}
 
JPanel getPanel() {
		return thePanel;
	}
 
public void addRow(String nazwkaKwiata,int ilosc,double cena) {
		int size = theRows.size();
		for(int i=0;i<ilosc;i++){
		theRows.add(new Row(nazwkaKwiata, 1 ,cena));
		theTableModel.fireTableRowsInserted(size, size);
		}
	}
 
public void removeRow() {
		int index = theTable.getSelectedRow();
		if (index == -1) return;
		
		theRows.remove(index);
		theTableModel.fireTableRowsDeleted(index, index);
		index = Math.min(index, theRows.size() - 1);
		if (index >= 0) {
			theTable.getSelectionModel().setSelectionInterval(index, index);
		}
	}
 
public int GetIndexRowSelected(){return theTable.getSelectedRow();}


private void validateSelection() {
theRemoveRowAction.setEnabled(theTable.getSelectedRow() != -1);
	}

	
 
	
 
	
}

then in other class i have
String k=table.getValu eAt(rowindex,1) ;but eclipse says that the method getValueAt (int,int)is undefined for type Table

**oll3i** · Apr 11 '07, 04:20 PM

but cd you tell my why eclipse says that the method getValueAt (int,int)is undefined for type Table

in String k=table.getValu eAt(rowindex,1) ;

**oll3i** · Apr 11 '07, 06:46 PM

i solved the problem thank you

table

table

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