fehler

Compiliere C:\Users\Benutzer\workspace\Test\src\Gui.java mit Java-Compiler
Gui.java:20:39: illegal escape character
    btnEins.setIcon(new ImageIcon("C:\Users\Benutzer\Pictures\BildOrdner\Eins.png"));
                                      ^
Gui.java:20:45: illegal escape character
    btnEins.setIcon(new ImageIcon("C:\Users\Benutzer\Pictures\BildOrdner\Eins.png"));
                                            ^
Gui.java:20:57: illegal escape character
    btnEins.setIcon(new ImageIcon("C:\Users\Benutzer\Pictures\BildOrdner\Eins.png"));
                                                        ^
Gui.java:20:66: illegal escape character
    btnEins.setIcon(new ImageIcon("C:\Users\Benutzer\Pictures\BildOrdner\Eins.png"));
                                                                 ^
Gui.java:20:73: illegal escape character
    btnEins.setIcon(new ImageIcon("C:\Users\Benutzer\Pictures\BildOrdner\Eins.png"));
                                                                        ^
5 errors