Help needed regarding file handling

Question

I have a file path.txt which contains the path of 10 other files....I am attempting to send path.txt through command line arguement and then read each line at a time from the file. Now each line in the file is a path to another file. I have used a string to store each line and am calling a function func() where I am sending the string. Now using that string which contains the path of another file say 1.txt i am trying to open 1.txt .......I have given my prog below....sending path.txt is working fine but reading a path from path.txt and opening that particular file is not happening
if possible kindly correct my program or give any other prog to do this problem
import java.io.*;
class Prog {
     int size;
     static void func(String str1)               throws IOException
          int i;
          int cnt=-1;
          FileInputStream fin;
          try {
               fin = new FileInputStream(str1);
          catch(FileNotFoundException exc)
               System.out.println(exc);
               return;
          catch(ArrayIndexOutOfBoundsException exc)
               System.out.println("Usage: Showfile file");
               return;
          do{
               i=fin.read();
               cnt++;
          }while(i!=-1);
          System.out.println("File size="+cnt);
          fin.close();
     public static void main(String args[]) throws IOException
          int i;
          int cnt=-1;
          String str1="",str="";
          FileInputStream fin;
          for(i=0;i<args.length;i++)
               str+=args;
               str+=" ";
          str=str.substring(0,str.length()-1);
          try {
               fin = new FileInputStream(str);
          catch(FileNotFoundException exc)
               System.out.println("File not found");
               return;
          catch(ArrayIndexOutOfBoundsException exc)
               System.out.println("Usage: Showfile file");
               return;
          i=0;
          while(true){
               i=fin.read();
               if(i==-1)
                    break;
               cnt++;
               if((char) i!='\n')
                         str1=str1+(char)i;
               else
                    func(str1);
                    str1="";
          System.out.println("File size="+cnt);
          fin.close();

Answer 1

just putting it in code blocks
import java.io.*;
class Prog {
int size;
static void func(String str1) throws IOException
int i;
int cnt=-1;
FileInputStream fin;
try {
fin = new FileInputStream(str1);
catch(FileNotFoundException exc)
System.out.println(exc);
return;
catch(ArrayIndexOutOfBoundsException exc)
System.out.println("Usage: Showfile file");
return;
do{
i=fin.read();
cnt++;
}while(i!=-1);
System.out.println("File size="+cnt);
fin.close();
public static void main(String args[]) throws IOException
int i;
int cnt=-1;
String str1="",str="";
FileInputStream fin;
for(i=0;i<args.length;i++)
str+=args;
str+=" ";
str=str.substring(0,str.length()-1);
try {
fin = new FileInputStream(str);
catch(FileNotFoundException exc)
System.out.println("File not found");
return;
catch(ArrayIndexOutOfBoundsException exc)
System.out.println("Usage: Showfile file");
return;
i=0;
while(true){
i=fin.read();
if(i==-1)
break;
cnt++;
if((char) i!='\n')
str1=str1+(char)i;
else
func(str1);
str1="";
System.out.println("File size="+cnt);
fin.close();
}