问JAVA:在GridBagLayout上对齐

EN

public void setPanelContent(Object[][] clientList, Object[][] msgList)
{

    JPanel jp_ = new JPanel();

    jp_.setLayout(new GridBagLayout());

    GridBagConstraints g = new GridBagConstraints();

    g.gridx = 1;
    //g.fill = GridBagConstraints.HORIZONTAL;
    g.anchor = GridBagConstraints.FIRST_LINE_START;
    g.weightx = 1;

    String  title[] = {"A", "B"};
    JTable tableau = new JTable(clientList, title);


    tableau.setTableHeader(null);
    tableau.setRowHeight(20);
    tableau.setShowGrid(false);
    tableau.setEnabled(false);

    // tableau.setOpaque(false);
    ((DefaultTableCellRenderer)tableau.getDefaultRenderer(Object.class)).setOpaque(false);

    tableau.getColumn("A").setMaxWidth(30);
    tableau.getColumn("B").setMinWidth(210);
    // tableau.getColumn("B").setMaxWidth(520);
    tableau.getColumnModel().getColumn(0).setCellRenderer(new ImageRenderer());

    jp_.add(tableau, g);
    jp_.setBackground(Color.CYAN); // for test

    jp_.setPreferredSize(new Dimension(jp.getWidth(), jp.getHeight()));

    jp.removeAll();
    jp.invalidate();

    jp.add(jp_);
    jp.updateUI();
    this.repaint();
}