AWT Textfield在MicroSoft JVM上表現異常

Question

使用MicroSoft JVM運行Applet時，我遇到一個奇怪的問題。 我有一個帶有4個文本字段的AWT面板，該面板已添加到對話框中。 一切正常，直到我在文本字段中輸入十進制值並關閉對話框。 當我重新打開對話框時，面板中帶有所有十進制數字的文本字段（在上一步中輸入）表現得很奇怪。 十進制值以及文本字段內的WHITE區域向左移動並隱藏數字。 當我在文本字段內單擊時，它變為正常。 小組先前有gridlayout，我什至嘗試將其更改為gridbaylayout，但問題仍然存在。

注意：所有開發都與JRE1.1有關，以與MS JVM兼容

如果有什么可以幫助我的，那將是一個很大的幫助。 提前致謝。

 public MyPanel(Dialog myDialog)
 {
  Panel panel = new Panel();
  this.dialog = myDialog;

//Previous code with grid layout

/*  panel.setLayout(new GridLayout2(4,2,2,2));
  panel.add(new Label("Symbol:"));
        panel.add(symbolField = new TextField("",20));
  panel.add(new Label("Quantity:"));
  panel.add( qtyField = new TextField());
  panel.add(new Label("Price per Share:"));
  panel.add( costField = new TextField());
  panel.add(new Label("Date Acquired:"));
  panel.add( purchaseDate = new TextField() );*/

  GridBagLayout gridbag = new GridBagLayout();
  System.out.println("######## Created New GridBagLayout");

  GridBagConstraints constraints = new GridBagConstraints();
  panel.setLayout( gridbag );

  constraints = buildConstraints( constraints, 0, 0, 1, 1, 1.5, 1 );
  constraints.anchor = GridBagConstraints.WEST;
  constraints.fill = GridBagConstraints.HORIZONTAL;
  panel.add( new Label("Symbol:"), constraints);

  constraints = buildConstraints( constraints, 1, 0, 1, 1, 1.5, 1 );
  constraints.anchor = GridBagConstraints.WEST;
  constraints.fill = GridBagConstraints.HORIZONTAL;
  panel.add( symbolField = new TextField("",20), constraints);

  constraints = buildConstraints( constraints, 0, 1, 1, 1, 1.5, 1 );
  constraints.anchor = GridBagConstraints.WEST;
  constraints.fill = GridBagConstraints.HORIZONTAL;
  panel.add( new Label("Quantity:"), constraints);

  constraints = buildConstraints( constraints, 1, 1, 1, 1, 1.5, 1 );
  constraints.anchor = GridBagConstraints.WEST;
  constraints.fill = GridBagConstraints.HORIZONTAL;
  panel.add( qtyField = new TextField(), constraints);

  constraints = buildConstraints( constraints, 0, 2, 1, 1, 1.5, 1 );
  constraints.anchor = GridBagConstraints.WEST;
  constraints.fill = GridBagConstraints.HORIZONTAL;
  panel.add( new Label("Price per Share:"), constraints);

  constraints = buildConstraints( constraints, 1, 2, 1, 1, 1.5, 1 );
  constraints.anchor = GridBagConstraints.WEST;
  constraints.fill = GridBagConstraints.HORIZONTAL;
  panel.add( costField = new TextField(), constraints);

  constraints = buildConstraints( constraints, 0, 3, 1, 1, 1.5, 1 );
  constraints.anchor = GridBagConstraints.WEST;
  constraints.fill = GridBagConstraints.HORIZONTAL;
  panel.add( new Label("Date Acquired:"), constraints);

  constraints = buildConstraints( constraints, 1, 3, 1, 1, 1.5, 1 );
  constraints.anchor = GridBagConstraints.WEST;
  constraints.fill = GridBagConstraints.HORIZONTAL;
  panel.add( purchaseDate = new TextField(), constraints);
..............

.........

}

Answer 1

我想出了解決這個問題的方法。 單擊“確定”后，將文本字段光標位置設置為0（零）似乎可以解決此問題。 這是代碼...

symbolField.setCaretPosition(0);  
qtyField.setCaretPosition(0);  
costField.setCaretPosition(0);