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Thread: How to programmatically set combobox width?

  1. #1
    Junior Member
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    Default How to programmatically set combobox width?

    Hi,

    Newbie in Java testing database access.
    Succeeded to load driver, make a connection and reading tablenames.
    Want to load retrieved tablenames into a jcombobox and afterwards adjust
    combobox width to show even the table with longest name.
    Tried this code:

      private void getTables(Connection conn) throws SQLException
      {
        DatabaseMetaData dbmd = conn.getMetaData();
     
        FontMetrics fm = cbxTableNames.getFontMetrics(cbxTableNames.getFont());
     
        int maxw, w;
        maxw = 0;
        String[] types = {"TABLE"};
        ResultSet tables = dbmd.getTables(null, null, null, types);
        while (tables.next()) 
        {
          String tablename = tables.getString("TABLE_NAME");
          w = fm.stringWidth(tablename);
          if (maxw < w)
          {  maxw = w;
          }
          cbxTableNames.addItem(tablename);
        }
        cbxTableNames.setVisible(true);
        lblTableNames.setVisible(true);
        cbxTableNames.setSize(new Dimension(maxw, 20));
      }

    Last statement:cbxTableNames.setSize(new Dimension(maxw, 20)); doesn't change the combobox width
    but adding a separate jButton and in its' ActionPerformed event executing:
    cbxTableNames.setSize(new Dimension(300, 20)) changes the with.

    Why and how can I achieve desired effect?

    Regards
    stab


  2. #2
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    Default Re: How to programmatically set combobox width?

    Try setPreferredSize(Dimension preferredSize) method instead.
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