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| public class DemoListCellRenderer {
public static void main(String[] args) {
JFrame frame = new JFrame("Démo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MyObject[] data = {
new MyObject(1, "Marie", "Directeur de projet"),
new MyObject(1, "Paul", "Chef de projet"),
new MyObject(1, "Caroline", "Développeur"),
new MyObject(1, "Marc", "Développeur"),
};
JComboBox<MyObject> combo = new JComboBox<>(data);
combo.setRenderer(new DefaultListCellRenderer() {
@Override
public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected,
boolean cellHasFocus) {
if ( value instanceof MyObject ) {
MyObject object = (MyObject) value;
setText(object.name+" ("+object.type+")");
}
return this;
}
});
combo.addActionListener(e-> afficheSelection(combo.getSelectedItem()));
frame.add(combo, BorderLayout.SOUTH);
frame.setSize(300, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static void afficheSelection(Object selectedItem) {
if ( selectedItem instanceof MyObject ) {
System.out.println("Object sélectionné : " + ((MyObject)selectedItem).id + "-" + ((MyObject)selectedItem).name);
}
}
public static class MyObject {
public final int id;
public final String name;
public final String type;
public MyObject(int id, String name, String type) {
this.id=id;
this.name=name;
this.type=type;
}
}
} |
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