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Код


public static String NameFile;
NameFile = args[2];
File f0;
        f0 = new File(NameFile);
        if(!f0.exists()){
            f0.createNewFile();
            System.out.println("New File " +NameFile+ "has been created" );
        }
BufferedWriter out = new BufferedWriter(new FileWriter(NameFile));

Object NameFiles[] = new Object[1000];
int i = 0;
for (File f : folder.listFiles())
{
    NameFiles[i] = f;
        i++;
}
int point = i;
i=0;

String Name;
for (i = 0; i<point ;i++)
        {
            Scanner scan = new Scanner(new FileReader((File)NameFiles[i]));
            
            ////////////////
            Name = (String)NameFiles[i];
            
            out.write(Name);
..........................

Код



import java.io.*;
import java.util.Scanner;




public class FileSearch{
    public static String str;
    public static String dir;
    public static String NameFile;
    /**
     * @param args
     * @return 
     * @throws IOException 
     */
    
    

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        
        
        if (args.length < 1)
        {
            System.out.println("Error. No args");
            System.exit(0);
        }
        if (args.length > 3)
        {
            System.out.println("Error. Many args");
            System.exit(0);
        }
        
        dir = args[0];
        NameFile = args[2];
        str = args[1];
                
        File Fdir;
        Fdir = new File(dir);
        if (!Fdir.exists())
        {
            System.out.println("Error. Dir " + dir + "is not found");
            System.exit(0);
        }
        
        
        
        File f0;
        f0 = new File(NameFile);
        if(!f0.exists()){
            f0.createNewFile();
            System.out.println("New File " +NameFile+ "has been created" );
        }
        
        
        //BufferedWriter out = new BufferedWriter(new FileWriter(NameFile));
        
        FileOutputStream fos = new FileOutputStream(NameFile);
        ObjectOutputStream out = new ObjectOutputStream(fos);
        
        System.out.println(dir + " "  + NameFile + " " + str);
        File folder = new File(dir);
        
        Object NameFiles[] = new Object[1000];
        int i = 0;
        for (File f : folder.listFiles())
        {
             NameFiles[i] = f;
             i++;
        }
        int point = i;
        i=0;
        
        
        String s;
        int pointer;
        String Name;
        for (i = 0; i<point ;i++)
        {
            Scanner scan = new Scanner(new FileReader((File)NameFiles[i]));
            System.out.println(NameFiles[i]);
            ////////////////
            
            out.writeObject("\t"+ NameFiles[i]+"\n");
            /////////////////////////
            
            while(scan.hasNext())
            {
                s = scan.next();
                
                pointer = s.indexOf (str);
                if (pointer != -1)
                {
                    System.out.println("s = "+s);
                    /////////////////
                    out.writeObject("s = " +s+ "\n");
                    
                }
            }
            System.out.println("------------");
            out.writeObject("++++++++++\n");
            ///////////
            
        }
    out.close();
    }
    }