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JavaSE 鼠标事件类(MouseEvent)实现

{相关信息}
鼠标事件类(MouseEvent)指组件中发生的鼠标动作事件,例如按下鼠标、释放鼠标、单击鼠标、鼠标光标进入或离开组件的几何图形、移动鼠标、拖动鼠标。当鼠标移动到某个区域或鼠标单击某个组件时就会触发鼠标事件。使用鼠标事件必须给组件添加一个MouseListener 接口的事件处理器,该接口包含以下 5 个方法:
void mouseClicked(MouseEvent e):当鼠标在该区域单击时发生
void mouseEntered(MouseEvent e):当鼠标进入该区域时发生
void mouseExited(MouseEvent e):当鼠标离开该区域时发生
void mousePressed(MouseEvent e):当鼠标在该区域按下时发生
void mouseReleased(MouseEvent e):当鼠标在该区域放开时发生

{实现效果图}
实验过程中,在panel区,明显可以看出单击可按下的区别。按一下马上松开是一个点击,获取一次位置信息。
如果按下不松开,移动后一会儿,再松开,不会获取位置信息。

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{相关代码}

package sup.orange.learn;import java.awt.*;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;/** * Created by re-x on 11/2/14. */public class MouseEventDemo extends Frame {    Panel panel;    TextField textfield1, textfield2;    public MouseEventDemo () {        super();        init();    }    public static void main(String[] args) {        new MouseEventDemo();    }    public void init() {        setLayout(new GridLayout(3, 1));        textfield1 = new TextField(30);        textfield2 = new TextField();        add(textfield1);        add(textfield2);        panel = new Panel();        panel.setBackground(Color.CYAN);        add(panel);        panel.addMouseListener(new MouseListener() {            @Override            public void mouseClicked(MouseEvent e) {                textfield2.setText("x="+e.getX()+";y="+e.getY());            }            @Override            public void mousePressed(MouseEvent e) {                textfield1.setText("mouse pressed");            }            @Override            public void mouseReleased(MouseEvent e) {                textfield1.setText("mouse released");            }            @Override            public void mouseEntered(MouseEvent e) {                textfield1.setText("mouse entered");            }            @Override            public void mouseExited(MouseEvent e) {                textfield1.setText("mouse exited");            }        });        addWindowListener(new WindowAdapter() {            @Override            public void windowClosing(WindowEvent e) {                super.windowClosing(e);                dispose();                System.exit(0);            }        });        setSize(200, 300);        setVisible(true);    }}

 

JavaSE 鼠标事件类(MouseEvent)实现