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POImplementing a general switch statement in Java
 

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    <p>I have a JSlider with values from 1 to 360. For each value I want to get an image from a database and put it to a JLabel. So I have 360 cases where the single difference is the variable switch used to get the corresponding image from database (see bellow code). I know that I need to refresh my code because with my "solution" the code it is very heavy.</p> <p>I hope that I was clear what I want to archive. Bellow is the code.</p> <pre><code>degreesSlider = new JSlider(); //my JSlider degreesSlider.setMajorTickSpacing(10); degreesSlider.setMaximum(360); degreesSlider.setMinorTickSpacing(1); degreesSlider.setOrientation(javax.swing.JSlider.VERTICAL); degreesSlider.setPaintLabels(true); degreesSlider.setPaintTicks(true); degreesSlider.setSnapToTicks(true); degreesSlider.setValue(0); degreesSlider.addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent evt) { int x = degreesSlider.getValue(); //get JSlider value int row = myJTable.getSelectedRow(); int realIndex = myJTable.convertRowIndexToModel(row); String clickJTable = (myJTable.getModel().getValueAt(realIndex, 0).toString()); //detect my JTable row click switch (x) { case 1: try { PreparedStatement pst = conn.prepareStatement("select pol, cros from test where degrees = ? AND id_min=?"); pst.setInt(1, x); //x is the only variable of the all 360 cases pst.setString(2, clickJTable); ResultSet rs = pst.executeQuery(); if (rs.next()) { byte[] imageP = rs.getBytes("pol"); byte[] imageC = rs.getBytes("cros"); pol = new ImageIcon(imagepolars); cros = new ImageIcon(imagecrossed); mineralsPolars.setIcon(pol); //put image into JLabel mineralsCrossed.setIcon(cros); //put image into JLabel } rs.close(); pst.close(); } catch (Exception e) { } break; //case 2, 3, 4 ... 360 with the same code and the difference between them is the variable x } } }); </code></pre>
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    1. USApopei Andrei Ionut
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    1. COIt's not clear what the difference is meant to be - you say "the difference between them is the variable x" but your `pst.setInt(1, x);` already does that...
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      1. USJon Skeet
 

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