e649. handling focus changes.txt

来自「这里面包含了一百多个JAVA源文件」· 文本 代码 · 共 11 行

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
        }
    }