e741. 将标签的焦点置于关联的文本框上面

This example associates a label with a text field using setLabelFor(). A mnemonic is set on the label. When the mnemonic keystroke is pressed, the text field will gain the focus.

In the following example, when ALT-L is pressed, the text field gains the focus.

    // Create text field
    JTextField textfield = new JTextField(25);
    
    // Create label and associate with text field
    JLabel label = new JLabel("Text Label");
    label.setDisplayedMnemonic(KeyEvent.VK_L);
    label.setLabelFor(textfield);

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