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/*

Projbect 10-1

Compare two files.

To use this program, specify the names of the files to be compared on the command line.

java CompFile FIRST.TXT SECOND.TXT

*/

import java.io.*;

class CompFiles {

public static void main(String args[]) throws IOException {

int i=0, j=0;

FileInputStream f1;

FileInputStream f2;

try {

// open first file

try {

f1 = new FileInputStream(args[0]);

} catch(FileNotFoundException exc) {

System.out.println(args[0] + " File Not Found");

return;

}

// open second file

try {

f2 = new FileInputStream(args[1]);

} catch(FileNotFoundException exc) {

System.out.println(args[1] + " File Not Found");

return;

}

} catch(ArrayIndexOutOfBoundsException exc) {

System.out.println("Usage: CompFiles f1 f2");

return;

}

// Compare files

try {

do {

i = f1.read();

j = f2.read();

if(i != j) break;

} while(i != -1 && j != -1);

} catch(IOException exc) {

System.out.println("File Error");

}

if(i != j)

System.out.println("Files differ.");

else

System.out.println("Files are the same.");

f1.close();

f2.close();

}

}