AWT Textfield在MicroSoft JVM上表现异常

Question

使用MicroSoft JVM运行Applet时，我遇到一个奇怪的问题。 我有一个带有4个文本字段的AWT面板，该面板已添加到对话框中。 一切正常，直到我在文本字段中输入十进制值并关闭对话框。 当我重新打开对话框时，面板中带有所有十进制数字的文本字段（在上一步中输入）表现得很奇怪。 十进制值以及文本字段内的WHITE区域向左移动并隐藏数字。 当我在文本字段内单击时，它变为正常。 小组先前有gridlayout，我什至尝试将其更改为gridbaylayout，但问题仍然存在。

注意：所有开发都与JRE1.1有关，以与MS JVM兼容

如果有什么可以帮助我的，那将是一个很大的帮助。 提前致谢。

 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

我想出了解决这个问题的方法。 单击“确定”后，将文本字段光标位置设置为0（零）似乎可以解决此问题。 这是代码...

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