哪个JLabel被点击了？ [英] which JLabel has been clicked?

问题描述

我有6个JLabel，每个都附加了一个不同的mouselistener类实例。如何知道点击了哪个JLabel？这些JLabel构成了一个二维数组。

I have 6 JLabel and each is having a different instance of a mouselistener class attached. How to know which JLabel has been clicked ? These JLabel form a two dimentional array.

推荐答案

我做这样的最简单的方法是，使用JButton并让它们看起来像JLabels一样使用这种语法格式。

The easiest way I did something like that was, to use JButtons and make them look like JLabels by the using this syntax formatting.

jButton.setBorder( BorderFactory.createEmptyBorder( 2, 2, 2, 2 ) );
jButton.setBorderPainted( false );
jButton.setContentAreaFilled( false );
jButton.setFocusPainted( false );
jButton.setHorizontalAlignment( SwingConstants.LEFT );

然后，你想要的是添加一个ActionLister和一个ActionCommand。例如

Then, what you want to is add an ActionLister and a ActionCommand. For example

jButton.addActionListener( this );
jButton.setActionCommand( "label1" );

然后只需处理actionListners即可为每个标签执行所需操作。

Then just handle the actionListners to do what you wanted for each label.

public void actionPerformed( ActionEvent arg0 )
{
    String command = arg0.getActionCommand();
    if( command.equalsIgnoreCase( "label1" ) )
    {
        //label1 code
    }
}

如下所述，这还有支持键盘和鼠标活动的额外好处。

As mentioned below this also has the added benefit of supporting both keyboard and mouse activities.

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