Java: Copier et Coller sur un JTextField

Toolkit toolkit = Toolkit.getDefaultToolkit();
Clipboard clipboard = toolkit.getSystemClipboard();
StringSelection strSel = new StringSelection(str);
clipboard.setContents(strSel, null);
       }catch(Exception err)

Java: Exemple d’un JTextField

    JFrame frame = new JFrame("ExempleJTextField");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane( ).setLayout(new java.awt.FlowLayout( ));
    frame.getContentPane( ).add(tf);