如JButton
JButton button = new JButton( "Click" );
button.addActionListener( a );class a implements ActionPerformed(){}
JButton button = new JButton( "Click" );
button.addActionListener( a );class a implements ActionPerformed(){}
public void actionPerformed( ActionEvent e ){
//此处定义你所要处理的事件
}
}
应该是button.addActionListener( new a );