exam102.java

java例子

import java.io.*;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.BufferedReader;
public class Exam102 
{public static void main(String args[])throws IOException{
 char[] b=new char[30];
 FileWriter aa=new FileWriter(args[0]);
 System.out.println("向文件"+args[0]+"输入内容为：");
 InputStreamReader isr=new InputStreamReader(System.in);
 BufferedReader buf=new BufferedReader(isr);
 String s=buf.readLine();
 for(int i=0;i<s.length();i++)
 {b[i]=s.charAt(i);
 aa.write(b[i]);}
 aa.close();

 File inputFile=new File(args[0]);
 File outputFile=new File(args[1]);
 FileInputStream in=new FileInputStream(inputFile);
 FileOutputStream out=new FileOutputStream(outputFile);
 int c;
 while((c=in.read())!=-1)
 out.write(c);
 in.close();
 out.close();

 System.out.println("文件"+args[0]+"中的内容为：");
 FileInputStream in2=new FileInputStream(inputFile);
 int e;
 while((e=in2.read())!=-1)
 System.out.print((char)e);
 in2.close();
 System.out.println("\n文件"+args[1]+"中的内容为：");
 FileInputStream in1=new FileInputStream(outputFile);
 int d;
 while((d=in1.read())!=-1)
 System.out.print((char)d);
 in1.close();
}}