f.addMouseMotionListener ( new MouseMotionAdapter() {
public void mouseDragged (MouseEvent e) {
String s = "Mouse dragging: X = " + e.getX() + " Y = " + e.getY();
tf.setText (s);
}
} );
注意tf,它可不是static
public void mouseDragged (MouseEvent e) {
String s = "Mouse dragging: X = " + e.getX() + " Y = " + e.getY();
tf.setText (s);
}
} );
注意tf,它可不是static
System.out.println(strStatic);//静态
System.out.println(unStatic);//非静态
System.out.println(_STR);//final
method1();//method of the enclosing class };
};