filestreamdemo.java

来自「Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想」· Java 代码 · 共 30 行

package chapter13;
import java.io.*;
public class FileStreamDemo
{
	static final String inputFile = "in.txt";
 	static final String outputFile = "out.txt";
 	public static void main(String args[])
 	{
 		try 
 		{ 
  			FileInputStream fIn = new FileInputStream(inputFile);
  			FileOutputStream fOut = new FileOutputStream(outputFile); 
  			while (fIn.available() > 0) 
  			{ 
    			byte[] b = new byte[40]; 
    			int nResult = fIn.read(b); 
    			if (nResult == -1) break; 
    				fOut.write(b,0,nResult);
    			System.out.println("正在复制文件...");
  			} 
  			System.out.println("in.txt已成功复制到out.txt!");
     		fIn.close(); 
     		fOut.close(); 
     	} 
    	catch (IOException e) 
    	{ 
  			e.printStackTrace(); 
 		}
 	}
}