.repaint() method does not work?

I am having issues with the repaint method. I overrode the paintComponent method, but when i call repaint with JPanel nothing happens.































































































































My code:

Java Code:

 
private class DrawPanel extends JPanel {
    private int[] zahlen;
    
    @Override
    public void paintComponent (Graphics g){

        super.paintComponents(g);
        int x = 8;
        
        for(int i = 0; i < zahlen.length; i++){

            int zahl = zahlen[i];
            g.drawLine(x, 233-(zahl*2), x, 233);
            x = x+3;
            
            
        }
    }
}

Java Code:

        String Stringbox1 = (String) sortBox1.getSelectedItem();
        String Stringbox2 = (String) sortBox2.getSelectedItem();
        String Stringbox3 = (String) sortBox3.getSelectedItem();
        String Stringbox4 = (String) sortBox4.getSelectedItem();
        String Selectionsort = "Selectionsort";
        String Bubblesort = "Bubblesort";
        String Insertionsort = "Insertionsort";
        String Quicksort = "Quicksort";
        String Mergesort = "Mergesort";
        
        
        
if (Stringbox1.equals(Bubblesort)){
            Panel1.repaint();
            bubbleSort(zahlen);
            Panel1.repaint(); 
        } else if (Stringbox1.equals(Selectionsort)){
            selectionSort(zahlen);
            

            
          } 
          else if (Stringbox1.equals(Insertionsort)){
            Panel1.repaint();
              insertionSort(zahlen);
            Panel1.repaint();
          } 
           else if (Stringbox1.equals(Quicksort)){
            Panel1.repaint();
               quickSortKomplett(zahlen);
            Panel1.repaint();
          }
           else if (Stringbox1.equals(Mergesort)){
              Panel1.repaint();
               mergeSort(zahlen);
              Panel1.repaint(); 
          }

if you will need it, i can upload my whole project :)