green.setBackground(Color.green);
green.setBackground(Color.GREEN);
    private void init() {        holeListe.setEnabled(false);        setLayout(new BorderLayout());        JPanel tempPanel1 = new JPanel();        tempPanel1.setLayout(new FlowLayout());        JLabel blau = new JLabel("     ");        blau.setOpaque(true);        blau.setBackground(Color.blue);        tempPanel1.add(blau);        tempPanel1.add(label4);        JLabel red = new JLabel("     ");        red.setOpaque(true);        red.setBackground(Color.red);        tempPanel1.add(red);        tempPanel1.add(label3);        JLabel black = new JLabel("     ");        black.setOpaque(true);        black.setBackground(Color.black);        tempPanel1.add(black);        tempPanel1.add(label2);        JLabel green = new JLabel("     ");        green.setOpaque(true);        green.setBackground(Color.green);        tempPanel1.add(green);        tempPanel1.add(label1);        JPanel panel3 = new JPanel(new BorderLayout());        panel3.add(holeListe, BorderLayout.WEST);        panel3.add(tempPanel1, BorderLayout.CENTER);        add(panel3, BorderLayout.NORTH);        actualDLDateiName.setPreferredSize(new Dimension(actualDLDateiName.            getPreferredSize().width, 17));        JPanel panel1 = new JPanel(new BorderLayout());        panel1.add(actualDLDateiName, BorderLayout.NORTH);        panel1.add(actualDlOverviewTable, BorderLayout.CENTER);        add(panel1, BorderLayout.CENTER);        holeListe.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent ae) {                holeListe.setEnabled(false);                downloadPanel.tryGetPartList();            }        });    }