JTable拖拽更改行高

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import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.util.*;import javax.swing.table.*;public class TableRowHeightFrame extends JFrame {    Vector col = new Vector();    DefaultTableModel dm = new DefaultTableModel(col, 0);    JScrollPane jScrollPane1 = new JScrollPane();    JTable table = new JTable(dm);    public TableRowHeightFrame() {        try {            loadString();            jbInit();            loadata();        } catch (Exception e) {            e.printStackTrace();        }    }    public static void main(String[] args) {                        TableRowHeightFrame frm = new TableRowHeightFrame();        frm.setBounds(400, 300, 600, 400);        frm.setVisible(true);    }    void loadString() {        col.add("id");        col.add("name");        col.add("age");        col.add("address");        dm.setColumnIdentifiers(col);    }        private void jbInit() throws Exception {        this.getContentPane().add(jScrollPane1, BorderLayout.CENTER);        jScrollPane1.getViewport().add(table, null);        MouseAdapterListener listener = new MouseAdapterListener();        table.addMouseListener(listener);        table.addMouseMotionListener(listener);    }    void loadata() {        dm.addRow(new Object[] { "1", "zt", "30", "wuxi" });        dm.addRow(new Object[] { "2", "zt", "30", "wuxi" });        dm.addRow(new Object[] { "3", "zt", "30", "wuxi" });        dm.addRow(new Object[] { "4", "zt", "30", "wuxi" });    }    class MouseAdapterListener extends java.awt.event.MouseMotionAdapter            implements MouseListener {        int oldY = 0;        int newY = 0;        int row = 0;        int oldHeight = 0;        boolean drag = false;        int increase = 0;        public MouseAdapterListener() {        }        public void mouseMoved(MouseEvent e) {            int onRow = table.rowAtPoint(e.getPoint());            int height = 0;            for (int i = 0; i <= onRow; i++) {                height = height + table.getRowHeight(i);            }            if (height - e.getY() < 3) {                drag = true;                table.setCursor(new Cursor(Cursor.N_RESIZE_CURSOR));            } else {                drag = false;                table.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));            }        }        public void mouseDragged(MouseEvent e) {            if (drag) {                int value = oldHeight + e.getY() - oldY;                if (value < 30)                    table.setRowHeight(row, 30);                else                                         table.setRowHeight(row, oldHeight + e.getY() - oldY);                                table.setRowSelectionInterval(row, row);                            }        }        public void mousePressed(MouseEvent e) {            oldY = e.getY();            row = table.rowAtPoint(e.getPoint());            oldHeight = table.getRowHeight(row);            table.setRowSelectionInterval(row, row);        }        public void mouseReleased(MouseEvent e) {            newY = e.getY();            table.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));        }        public void mouseClicked(MouseEvent e) {        }        public void mouseEntered(MouseEvent e) {        }        public void mouseExited(MouseEvent e) {        }    }}
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