Problema com tamanho do JList e JScrollPane, apos adcionar itens no Jlist

builder.add(labelDiretorio, cc.xy(2, 2));
	builder.add(labelSimular, cc.xy(6, 2));

	builder.add(paneDiretorio, cc.xy(2, 4, CellConstraints.FILL, CellConstraints.FILL));
	builder.add(paneArquivos, cc.xy(6, 4, CellConstraints.FILL, CellConstraints.FILL));
	
	JPanel painel = new JPanel();
	painel.setLayout(new GridLayout(2, 2, 5, 5)); //grid com espacamento 5 
	
	painel.add(this.botaoSub);
	painel.add(this.botaoAdd);
	painel.add(this.botaoSubAll);
	painel.add(this.botaoAddAll);
			
	builder.add(painel, cc.xy(4, 4));
	builder.add(labelFiltro, cc.xy(2, 6));
	builder.add(filtroCombo, cc.xy(2, 8, CellConstraints.LEFT, CellConstraints.CENTER));