?? mouseeventexam.java
字號:
//mouseEventExam.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class mouseEventExam extends JFrame {
int xValue, yValue; // 記憶鼠標位置(X,Y)
public mouseEventExam() { // 構造方法
super("鼠標事件示例");
// 定義一個匿名類實現MouseMotionListener接口
addMouseMotionListener(new MouseMotionListener() {
public void mouseDragged(MouseEvent e) {
xValue = e.getX();
yValue = e.getY();
repaint(); // 調用paint()方法
}
public void mouseMoved(MouseEvent e) {
// 該方法為空,但必須實現該方法
}
}
);
setSize(300, 150);
}
protected void frameInit() {
enableEvents(AWTEvent.KEY_EVENT_MASK | AWTEvent.WINDOW_EVENT_MASK);
}
public void paint(Graphics g) {
g.fillOval(xValue, yValue, 4, 4); // 畫圓
}
public static void main(String args[]) {
mouseEventExam obj = new mouseEventExam();
obj.setVisible(true);
}
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
}
}
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -