package?com.fei;

import?java.awt.*;

public?class?Ball?{
????private?double?x?y;//左上角的位置
????private?boolean?isAlive?=?true;
????private?boolean?moveToRight?=?true?moveToDown?=?true;
????private?int?count;

????private?static?int?XSpeed?=?20;

????private?static?int?YSpeed?=?15;
????public?static?int?R?=?4;

????public?Ball（）?{
????????this.x?=?0;
????????this.y?=?0;
????????count?=?0;
????}

????public?Ball（int?x?int?y）?{
????????this.x?=?x;
????????this.y?=?y;
????}

????public?void?draw（Graphics?g）?{
????????if?（isAlive）?{
????????????Color?c?=?g.getColor（）;
????????????g.setColor（Color.YELLOW）;
????????????g.fillOval（（int）?x?（int）?y?R?+?R?R?+?R）;
????????????g.setColor（c）;
//????????????System.out.println（x+“\t“+y）;
????????}
????}

????public?void?move（double?dt）?{
????????if?（moveToDown）
????????????y?+=?YSpeed?*?dt;
????????else
????????????y?-=?YSpeed?*?dt;
????????if?（moveToRight）
????????????x?+=?XSpeed?*?dt;
????????else
????????????x?-=?XSpeed?*?dt;
//????????System.out.println（x?+?“\t“?+?y）;
????}

????public?Rectangle?getRect（）?{
????????return?new?Rectangle（（int）x?-?R?（int）?y?-?R?R?+?R?R?+?R）;//?加法速度比乘法快
????}

????public?double?getX（）?{
????????return?x;
????}

????public?double?getY（）?{
????????return?y;
????}

????public?int?getCount（）?{
????????return?count;
????}

????public?int?getXSpeed（）?{
????????return?XSpeed;
????}

????public?int?getYSpeed（）?{
????????return?YSpeed;
????}

????public?boolean?isAlive（）?{
????????return?isAlive;
????}

????public?void?setIsAlive（boolean?isAlive）?{
????????this.isAlive?=?isAlive;
????}

????public?boolean?isMoveToDown（）?{
????????return?moveToDown;
????}

????public?boolean?isMoveToRight（）?{
????????return?moveToRight;
????}

????public?boolean?bounceOffVertical（Event?e）?{
????????boolean?flag?=?false;
????????Brick?brick?=?e.getBrick（）;
????????if（brick?==?null）{
????????????flag?=?true;
????????????this.count++;
????????????this.moveToRight?=?!?this.moveToRight;
????????}else{
????????????if（brick.isAlive（）?&&?this.y+0.1?>=?brick.getTop（）?-?R?-?R?&&?this.y-0.1?<=?brick.getBottom（）?-?R）?{
????????????????flag?=?true;
????????????????this.count++;
????????????????this.moveToRight?=?!this.moveToRight;
????????????????brick.setLive（false）;
????????????}
????????}
????????return?flag;
????}

????public?boolean?bounceOffHorizontal（Event?eWall?myWall）?{
????????boolean?flag?=?false;
????????Brick?brick?=?e.getBrick（）;
????????if（brick?==?null）{
????????????if（this.moveToDown?&&?this.x+0.1?>=?myWall.getX（）?-?R?&&?this.x-0.1?<=?myWall.getX（）?+?Wall.WIDTH?-?R）?{
????????????????flag?=?true;
????????????????this.count++;
????????????????this.moveToDown?=?false;
????????????}else?if（!this.moveToDown）{
????????????????flag?=?true;
????????????????this.count++;
????????????????this.moveToDown?=?true;
????????????}
????????}else{
????????????if（brick.isAlive（）?&&?this.x+0.1

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????301??2017-12-27?19:00??xiaoyouxi\.classpath

?????文件????????385??2017-12-27?19:00??xiaoyouxi\.project

?????文件????????598??2017-12-27?19:00??xiaoyouxi\.settings\org.eclipse.jdt.core.prefs

?????文件???????3417??2018-01-04?00:05??xiaoyouxi\bin\com\fei\Ball.class

?????文件???????1951??2018-01-02?20:51??xiaoyouxi\bin\com\fei\Brick.class

?????文件????????962??2018-01-02?20:55??xiaoyouxi\bin\com\fei\DIYArrayList$DIYArrayIterator.class

?????文件???????2656??2018-01-02?20:55??xiaoyouxi\bin\com\fei\DIYArrayList.class

?????文件???????1600??2018-01-02?20:58??xiaoyouxi\bin\com\fei\Event.class

?????文件????????644??2018-01-02?23:49??xiaoyouxi\bin\com\fei\GAME$1.class

?????文件????????913??2018-01-02?23:49??xiaoyouxi\bin\com\fei\GAME$2.class

?????文件????????868??2018-01-02?23:49??xiaoyouxi\bin\com\fei\GAME$KeyMonitor.class

?????文件???????2460??2018-01-02?23:49??xiaoyouxi\bin\com\fei\GAME$PaintThread.class

?????文件???????6901??2018-01-02?23:49??xiaoyouxi\bin\com\fei\GAME.class

?????文件???????1469??2018-01-02?22:23??xiaoyouxi\bin\com\fei\MinPQ$HeapIterator.class

?????文件???????4841??2018-01-02?22:23??xiaoyouxi\bin\com\fei\MinPQ.class

?????文件???????1068??2018-01-02?20:24??xiaoyouxi\bin\com\fei\Wall$Direction.class

?????文件???????2944??2018-01-02?20:24??xiaoyouxi\bin\com\fei\Wall.class

?????文件???????3306??2018-01-04?00:05??xiaoyouxi\src\com\fei\Ball.java

?????文件???????1005??2018-01-02?20:51??xiaoyouxi\src\com\fei\Brick.java

?????文件???????1764??2018-01-02?20:55??xiaoyouxi\src\com\fei\DIYArrayList.java

?????文件????????955??2018-01-02?20:58??xiaoyouxi\src\com\fei\Event.java

?????文件???????8810??2018-01-02?23:49??xiaoyouxi\src\com\fei\GAME.java

?????文件???????9103??2018-01-02?22:23??xiaoyouxi\src\com\fei\MinPQ.java

?????文件???????2290??2018-01-02?20:24??xiaoyouxi\src\com\fei\Wall.java

?????目錄??????????0??2018-01-07?14:16??xiaoyouxi\bin\com\fei

?????目錄??????????0??2018-01-07?14:16??xiaoyouxi\src\com\fei

?????目錄??????????0??2018-01-07?14:16??xiaoyouxi\bin\com

?????目錄??????????0??2018-01-07?14:16??xiaoyouxi\src\com

?????目錄??????????0??2018-01-07?14:16??xiaoyouxi\.settings

?????目錄??????????0??2018-01-07?14:16??xiaoyouxi\bin

............此處省略5個文件信息