mytype5.java

java的IO类演示

import java.io.*;

public class MyType5
{
	public static void main(String argv[])
	{
		try {
			FileReader fin = new FileReader(argv[0]);
			LineNumberReader lnr = new LineNumberReader(fin);
			
			String str = lnr.readLine();
			while (str != null)
			{
				System.out.println(lnr.getLineNumber()+":"+str);
				str = lnr.readLine();
			}
			
			lnr.close();
			fin.close();
		}
		catch (IOException e)
		{
			System.err.println(e);
		}
	}
}