analyzeshell.java

很好的播放软件可以用FFT算法计算波形 有点像media9 不过完整程序有两个部分

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class AnalyzeShell extends JDialog implements ActionListener,ItemListener
{
	private int n;
	private AnalyzePan analyzePan;
	private JPanel btnPan,toolPan;
	private JButton btnDraw;
	private JComboBox cbNumber;
	private ButtonGroup rbChoose;
	private JRadioButton rbDFT,rbFFT;
	
	public AnalyzeShell(int[] data,Frame f)
	{
		super(f,null,true);
		btnDraw=new JButton("绘图");

		rbDFT=new JRadioButton("DFT算法",true);
		rbFFT=new JRadioButton("FFT算法",false);
		
		String[] number={"128","256","512","1024"};
		cbNumber=new JComboBox(number);
		cbNumber.setBorder(BorderFactory.createTitledBorder("采样数"));
		cbNumber.setPreferredSize(new Dimension(80,50));
		cbNumber.setOpaque(false);
		cbNumber.setSelectedIndex(3);
		
		rbChoose=new ButtonGroup();
		rbChoose.add(rbDFT);
		rbChoose.add(rbFFT);

		analyzePan=new AnalyzePan(data,1024);
	 	btnPan=new JPanel();
	 	toolPan=new JPanel();
	 	toolPan.setBorder(BorderFactory.createTitledBorder("参数设置"));
		toolPan.setPreferredSize(new Dimension(100,400));
		
		toolPan.add(rbDFT);
		toolPan.add(rbFFT);
		toolPan.add(cbNumber);
		toolPan.add(btnDraw);
		
		btnDraw.addActionListener(this);
		rbDFT.addItemListener(this);
		rbFFT.addItemListener(this);
		cbNumber.addItemListener(this);
		
		
		getContentPane().add(toolPan,BorderLayout.EAST);
        getContentPane().add(analyzePan,BorderLayout.CENTER);
        
       	setTitle("频谱分析");
		setSize(500,400);
		setVisible(true);
		
		//窗口打开后在屏幕中央显示
 		int ScreenWidth=getToolkit().getScreenSize().width;
		int ScreenHeight=getToolkit().getScreenSize().height;
		setLocation((ScreenWidth-getWidth())/2,(ScreenHeight-getHeight())/2);
	}
	
	public void drawWave()
	{
		analyzePan.createWaveForm();
	}
	
	public void actionPerformed(ActionEvent e)
	{
		drawWave();
	}
	
	public void itemStateChanged(ItemEvent e)
	{
		int number;
		if(e.getItem() instanceof JRadioButton)
		{
			JRadioButton temp=(JRadioButton)e.getItem();
			if(temp.isSelected())
			{
				System.out.println(temp.getText());
			}
		}
		if(e.getSource() instanceof JComboBox)
		{
			JComboBox temp=(JComboBox)e.getSource();
			number=Integer.parseInt((String)temp.getSelectedItem());
			//这里有一个奇怪的问题，为什么每次选择都会出现两次呢？
			analyzePan.setSampleNumber(number);
		}
	}
	
	public static void main(String args[])
	{
		//AnalyzeShell test=new AnalyzeShell();
	}
}