如何将掩码设置为SWT文本以仅允许小数

您将必须

Listener

Text

SWT.Verify

Listener

以下内容仅允许在文本字段中插入小数。每次您更改文本中的内容并拒绝它（如果不是十进制）时，它将检查该值。这将解决您的问题，因为在

VerifyListener

public static void main(String[] args) {    Display display = Display.getDefault();    final Shell shell = new Shell(display);    shell.setLayout(new FillLayout());    final Text textField = new Text(shell, SWT.BORDER);    textField.addVerifyListener(new VerifyListener() {        @Override        public void verifyText(VerifyEvent e) { Text text = (Text)e.getSource(); // get old text and create new text by using the VerifyEvent.text final String oldS = text.getText(); String newS = oldS.substring(0, e.start) + e.text + oldS.substring(e.end); boolean isFloat = true; try {     Float.parseFloat(newS); } catch(NumberFormatException ex) {     isFloat = false; } System.out.println(newS); if(!isFloat)     e.doit = false;        }    });    shell.pack();    shell.open();    while (!shell.isDisposed()) {        if (!display.readAndDispatch()) display.sleep();    }}