Copying a Row or Column in a JTable Component
This example demonstrates how to copy a column or row of data
in a DefaultTableModel.
DefaultTableModel model = new DefaultTableModel();
JTable table = new JTable(model);
// Create some data
// Get all the table data
Vector data = model.getDataVector();
// Copy the second row
Vector row = (Vector)data.elementAt(1);
row = (Vector)row.clone();
// Overwrite the first row with the copy
Vector firstRow = (Vector)data.elementAt(0);
for (int i=0; i<row.size(); i++) {
firstRow.set(i, row.get(i));
}
// Append the copy to the end of the table.
// Note that a copy is NOT made of 'row'.
model.addRow(row);
// Copy the first column
int mColIndex = 0;
java.util.List colData = new ArrayList(table.getRowCount());
for (int i=0; i<table.getRowCount(); i++) {
row = (Vector)data.elementAt(i);
colData.add(row.get(mColIndex));
}
// Copy it to the second column
for (int i=0; i<colData.size(); i++) {
row = (Vector)data.elementAt(i);
row.set(1, colData.get(i));
}
// Append a new column with copied data
model.addColumn("Col3", colData.toArray());
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