当鼠标点击和放开时发生动作事件; 方法摘要: 列: public class shijian extends Frame { public static void main(String[] args) { Frame f new Frame(); f.setLayout(new FlowLayout(FlowLayout.LEFT,20,5)); Button b1 new Button(&quo…
一、事件监听 public class TestListener {public static void main(String[] args) {Frame frame new Frame();Button button new Button("buttom");ActionListener actionListener new MyActionListener();button.addActionListener(actionListener);frame.add(…
java.sql.SQLException: The server time zone value �й���ʱ�� is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimez…