Question

mousemotionlistener接口包含哪些方法

Answer 1

当实现接口时，要实现其所有的方法。其中用不到的方法，实现为空方法。代码修改如下： import java.awt.*; import java.awt.event.*; public class TestMouse implements MouseListener,MouseMotionListener{ public static void main (String args[ ]){ TestMouse t=new TestMouse( ); t.go( );}void go(){Frame f = new Frame("fang"); f.setSize(208,230); f.addMouseListener(this); f.addMouseMotionListener(this); f.setVisible(true);}//implement methods in MouseMotionListener public void mouseMoved(MouseEvent ev){ int x1=ev.getX(); int y1=ev.getY(); System.out.print("mousemoved"+" "+x1+" "+y1);}public void mouseDragged(MouseEvent ev){} //implement methods in MouseListener public void mouseClicked(MouseEvent ev){} public void mousePressed(MouseEvent ev){} public void mouseReleased(MouseEvent ev){} public void mouseEntered(MouseEvent ev){}} 接口方法没有重载