e649. 处理焦点改变事件

    
component.addFocusListener(new MyFocusListener());
    
    public class MyFocusListener extends FocusAdapter {
        public void focusGained(FocusEvent evt) {
            // The component gained the focus
        }
        public void focusLost(FocusEvent evt) {
            // The component lost the focus
        }
    }

e649. 处理焦点改变事件

原文：https://www.cnblogs.com/borter/p/9575397.html