输入流类ProgressMonitorInputStream 表示一个进度条

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.InputStream;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.ProgressMonitorInputStream;
import javax.swing.border.EmptyBorder;

public class test1 extends JFrame {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private static String fileName = "sdk-tools-windows-3859397.zip";
	private JPanel contentPane;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					test1 frame = new test1();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 * 
	 * @throws Exception
	 */
	@SuppressWarnings("resource")
	public test1() throws Exception {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 450, 300);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		contentPane.setLayout(new BorderLayout(0, 0));
		setContentPane(contentPane);

		ProgressMonitorInputStream df = new ProgressMonitorInputStream(null, "null" + fileName,
				new FileInputStream(fileName));


		InputStream in = new BufferedInputStream(df);

		byte[] b = new byte[1024 * 500];//接收数据的数组
		int len = 0;//多少组数据
		String str="";
		int i=0;
		while ((len = in.read(b)) != -1) {
			i++;
			str+=""+b[i];
			System.out.println("读取了[" + len + "]个字节"+"  每组里的数据"+str);
			Thread.sleep(100);

		}

	}

}