问如何在Java中显示同一jLabel中的不同行

EN

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 */

package avd;

import java.io.File;



/**
 *
 * @author USER
 */
public class arborescence {
   private String initialpath = "";
    private Boolean recursivePath = false;
    public int filecount = 0;
    public int dircount = 0;

/**
 * Constructeur
 * @param path chemin du répertoire
 * @param subFolder analyse des sous dossiers
 */
    public arborescence(String path, Boolean subFolder) {
        super();
        this.initialpath = path;
        this.recursivePath = subFolder;
    }

    public void list() {
        this.listDirectory(this.initialpath);
    }

    private void listDirectory(String dir) {
        File file = new File(dir);
        File[] files = file.listFiles();
        if (files != null) {
            for (int i = 0; i < files.length; i++) {
                if (files[i].isDirectory() == true) {
                    System.out.println("Dossier: " + files[i].getAbsolutePath());
                    FirstWindow.lblRepertoire.setText(files[i].getAbsolutePath());
                    this.dircount++;
                } else {
                    System.out.println("  Fichier: " + files[i].getName());
                    FirstWindow.lblFile.setText(files[i].getAbsolutePath());
                   this.filecount++;
                }
                if (files[i].isDirectory() == true && this.recursivePath == true) {
                    this.listDirectory(files[i].getAbsolutePath());
                }
            }
        }
    }    
}

public void  scanfiles(){
 String pathToExplore = fileName;
 arborescence arbo = new arborescence(pathToExplore, true);
  Long start = System.currentTimeMillis();
  arbo.list();
  System.out.println("----------");
  System.out.println("Analyse de " + pathToExplore + " en " + (System.currentTimeMillis() - start) + " mses");
  lbltime.setText(Integer.toString((int) (System.currentTimeMillis() - start)));
  System.out.println(arbo.dircount + " dossiers");
  lblCountRep.setText(Integer.toString(arbo.dircount));
  System.out.println(arbo.filecount + " fichiers");
  lblCountFiles.setText(Integer.toString(arbo.filecount));
}