AWT Textfield 与 MicroSoft JVM 的行为很奇怪答案

【问题标题】：AWT Textfield behaves weird with MicroSoft JVMAWT Textfield 与 MicroSoft JVM 的行为很奇怪
【发布时间】：2015-11-10 08:50:57
【问题描述】：

在使用 MicroSoft JVM 运行我的 Applet 时，我遇到了一个奇怪的问题。我有一个带有 4 个文本字段的 AWT 面板，它被添加到一个对话框中。一切都很好，直到我在文本字段中输入一个十进制值并关闭对话框。当我重新打开对话框时，面板内带有所有小数位（在上一步中输入）的文本字段表现得很奇怪。十进制值与文本字段内的白色区域一起向左移动并隐藏数字。当我在文本字段内单击时，它变得正常。面板之前有 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

如果有人可以帮助我，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);
..............

.........

}

【问题讨论】：

标签： java jvm awt

【解决方案1】：

我想出了解决这个问题的办法。单击“确定”后将文本字段光标位置置于 0（零）似乎可以解决此问题。这是代码......

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

【讨论】：