mytype6.java

java的IO类演示

import java.io.*;

public class MyType6
{
	public static void main(String argv[])
	{
		try {
			FileReader fin = new FileReader(argv[0]);
			
			int i = fin.read();
			int line = 1;
			if (i != -1)
				System.out.print(line+":");
				
			while (i != -1)
			{
				if ((char)i == '\n')
				{
					line++;
					System.out.print("\n"+line+":");
				}
				else
					System.out.print((char)i);

				i = fin.read();
			}
			
			fin.close();
		}
		catch (IOException e)
		{
			System.err.println(e);
		}
	}
}