The problem about Focuslistener in SWT

Problem in SWT Focuslistener can be used to monitor whether a TextField is selected,
In the following program, I add Focuslistener to two text, which is the function of
When text is selected, the above text will be selected as a full state.
I don't know why it works only for the first one.
It was later discovered that the two-text type was different.
Just the text of Swt.single, as if SelectAll () is invalid.

Textfield1.java
Import Org.eclipse.swt.SWT;
Import org.eclipse.swt.events.FocusEvent;
Import Org.eclipse.swt.events.FocusListener;
Import org.eclipse.swt.widgets.*;

public class TextField1 {

Display D;
Shell s;
TextField1 () {
D = new Display ();
s = new Shell (d);
S.setsize (250,250);
S.settext ("A Text Field Example");
Text Text1 = new text (s, SWT. WRAP | Swt. BORDER);
Text1.setbounds (100,50,100,20);
Text1.settextlimit (5);
Text1.settext ("12345");
Text Text2 = new text (s, SWT. Single | Swt. BORDER);
Text2.setbounds (100,75,100,20);
Text2.settextlimit (10);

Add a Focus listener
Focuslistener Focuslistener = new Focuslistener () {
public void focusgained (FocusEvent e) {
Text T = (text) e.widget;
T.selectall ();
}
public void Focuslost (FocusEvent e) {
Text T = (text) e.widget;
if (T.getselectioncount () > 0) {
T.clearselection ();
}
}
};
Text1.addfocuslistener (Focuslistener);
Text2.addfocuslistener (Focuslistener);
S.open ();
while (!s.isdisposed ()) {
if (!d.readanddispatch ())
D.sleep ();
}
D.dispose ();
}
public static void Main (string[] args) {
TextField1 tx = new TextField1 ();
}
}