chapter09多媒体与图形学程序设计JavaP.pptxVIP

第9章 多媒体与图形学程序设计;第9章 多媒体与图形学程序设计;一、声音播放;加载声音文件;加载声音文件;在Applet中播放声音;例1程序源码： J_Audio.java; String choices[] = { hi, bark,PINBALL,BATTVLOW }; m_comboChoose = new JComboBox( choices ); m_comboChoose.addItemListener( this ); container.add( m_comboChoose ); m_buttonPlay = new JButton( Play ); m_buttonPlay.addActionListener( this ); container.add( m_buttonPlay ); m_buttonLoop = new JButton( Loop ); m_buttonLoop.addActionListener( this ); container.add( m_buttonLoop ); m_buttonStop = new JButton( Stop ); m_buttonStop.addActionListener( this ); container.add( m_buttonStop ); // load sounds and set m_soundCurrent m_soundFirst = getAudioClip( getDocumentBase( ), hi.au ); m_soundSecond = getAudioClip( getDocumentBase( ), bark.au ); m_soundThird = getAudioClip( getDocumentBase( ), PINBALL.MID ); m_soundFourth = getAudioClip( getDocumentBase( ), BATTVLOW.WAV ); m_soundCurrent = m_soundFirst; };public void stop( ) { // Stop playing sound m_soundCurrent.stop( ); } public void itemStateChanged( ItemEvent e ) { m_soundCurrent.stop( ); switch(m_comboChoose.getSelectedIndex( )){ case 0:m_soundCurrent=m_soundFirst;break; case 1:m_soundCurrent=m_soundSecond;break; case 2:m_soundCurrent=m_soundThird;break; case 3:m_soundCurrent=m_soundFourth;break; default:m_soundCurrent=m_soundFirst;break; } } public void actionPerformed(ActionEvent e){ if ( e.getSource( ) == m_buttonPlay ) m_soundCurrent.play( ); else if ( e.getSource( ) == m_buttonLoop ) m_soundCurrent.loop( ); else if ( e.getSource( ) == m_buttonStop ) m_soundCurrent.stop( ); } // End of method: actionPerformed }; 二、图像显示;1、加载图像;2、显示图像;2、显示图像;例2：显示图像;运行结果;3、幻灯机效果;例3：多幅图像的显示;三、图形处理;图形环境和图形对象;颜色控制;字体控制;例5：显示4种不同大小、不同字体的文本;画线、矩形和椭圆;画圆弧;