tf_textfield.html
来自「java类库详细讲解」· HTML 代码 · 共 156 行
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<TITLE>Creating a JTextField Component
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<B><A HREF="../javax.swing.text/pkg.html#JTextField">JTextField</A></B><font color="#666666" SIZE="-2">
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<h3>
e978.
Creating a JTextField Component</h3>
When the user hits RETURN, the text field fires an action event.
<pre>
// Create a text field with some initial text
JTextField textfield = new JTextField(<font color="#0066ff"><i>"Initial Text"</i></font>);
// Create a text field with some initial text and a default number of columns.
// The number of columns controls the preferred width of the component;
// each column is rougly the size of an M in the current font.
int cols = <font color="#0066ff"><i>30</i></font>;
textfield = new JTextField(<font color="#0066ff"><i>"Initial Text"</i></font>, cols);
// Listen for action events, which are fired when the user hits RETURN
textfield.addActionListener(new MyActionListener());
class MyActionListener implements ActionListener {
public void actionPerformed(ActionEvent evt) {
JTextField textfield = (JTextField)evt.getSource();
<font color="#0066ff"><i>process</i></font>(textfield.getText());
}
}
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Related Examples
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e979. <a class="eglink" href="tf_PassField.html?l=rel">
Creating a Password JTextField Component
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e980. <a class="eglink" href="tf_Align.html?l=rel">
Aligning the Text in a JTextField Component
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See also:
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#Actions%20and%20Key%20Bindings">
Actions and Key Bindings
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<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#Caret%20and%20Selection">
Caret and Selection
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<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#Events">
Events
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JEditorPane">
JEditorPane
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JFormattedTextField">
JFormattedTextField
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JTextArea">
JTextArea
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JTextComponent">
JTextComponent
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JTextPane">
JTextPane
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#Styles">
Styles
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