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problema com scrollpane de um jlist


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Boa tarde,

não percebo o porquê de não conseguir mostrar o scrollpane numa JList...

String[] info = {"Lista vazia!!"};
       JPanel flow = new JPanel(new FlowLayout());
       flow.setBorder(BorderFactory.createTitledBorder("Chaves primárias:"));
       //cria uma JList com o nome dos campos inseridos
       nomeCampos = new JList(info);
       nomeCampos.setPreferredSize(new Dimension(150, 10));
       //permite que sejam seleccionados varios campos
       JScrollPane jsp = new JScrollPane(nomeCampos);

esse panel está inserido num grid que, por sua vez, está inserido no centro de um borderLayout().

alguém sabe o que está mal?


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