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如何清除推向纽顿的小块土
原标题:how to clear a jtextfield pushing a button

我有一个JButton,在我推动的时候,它必须清除JTextfield的所有内容。 我如何能够这样做? 也许有办法清理一个“JTextfield”或我是否必须把这个领域划为null?

最佳回答

JText Field#setText

关于对<代码>JButton的回复,点击,附上一份<代码> 行动指示/代码>。 斯温德教授非常详细地说明了这一点。

  1. Button tutorial
  2. Text component tutorial
  3. ActionListener tutorial
问题回答

Try using the setText(String) 2. 具有空洞论点的方法:

myTextField.setText("");

您可以称之为<代码>setText(")方法>。 这将将<代码>JText Field中的“”改为“”。

http://docs.oracle.com/javase/7/docs/api/javax/swing/text/JTextComponent.html#setText(java.lang.String

甚至可以扩大<代码>JText Field类别,并增加一个叫做clear(<>clear(>)。 这一类人想像:

public class MyCustomJTextField extends JTextField {

    private static final String EMPTY_STRING = "";

    public void clear() {
        setText(EMPTY_STRING);
    }
}




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