JSpinner没有负值
我正在netbeans中构建一个小应用程序,我使用JSpinner组件来设置产品的数量。如何设置微调器只取正值?我可以在Netbeans中选择我可以设置的方法还是JSpinner
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额外:
spinner.setModel(new SpinnerNumberModel(0, 0, 20, 1));
对于JSpinner,您必须实现SpinnerNumberModel
import javax.swing.*; public class SpinnerModelTest { public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { new SpinnerModelTest().makeUI(); } }); } public void makeUI() { SpinnerModel modeltau = new SpinnerNumberModel(0.0002, 0.0001, 100.0000, 0.0001); JSpinner spinner = new JSpinner(modeltau); ((JSpinner.NumberEditor) spinner.getEditor()).getFormat().setMaximumFractionDigits(4); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(spinner); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }
它适用于r0ast3d的库引用:
((SpinnerNumberModel) mySpinner.getModel()).setMinimum(0);