Please fix the code it loops util finds all the differences in two files. import
ID: 3788424 • Letter: P
Question
Please fix the code it loops util finds all the differences in two files.
import java.io.*;
import java.util.Scanner;
public class {
public static void differences(Scanner file1, Scanner file2)
throws IOException{
String firstLines = file1.nextLine();
String secondLines = file2.nextLine();
while(firstLines != null || secondLines != null){
int lineNum = 1;
int comparison = firstLines.compareTo(secondLines);
System.out.println("Differences found:");
if(comparison != 0){
System.out.println("Line "+lineNum);
System.out.println("<"+firstLines);
System.out.println(">"+secondLines);
System.out.println(" ");
}
break;
}
}
public static void main (String[]args)
throws FileNotFoundException, IOException{
Scanner console = new Scanner(System.in);
System.out.println("Please enter the name of the first file: ");
File firstFile = new File(console.nextLine());
Scanner userFile1 = new Scanner(firstFile);
System.out.println("Please enter the name of the second file: ");
File secondFile = new File(console.nextLine());
Scanner userFile2 = new Scanner(secondFile);
console.close();
differences(userFile1, userFile2);
}
}
Explanation / Answer
import java.io.*;
import java.util.Scanner;
public class A {
public static void differences(Scanner file1, Scanner file2)
throws IOException{
String firstLines = file1.nextLine();
String secondLines = file2.nextLine();
while(firstLines != null || secondLines != null){
int lineNum = 1;
int comparison = firstLines.compareTo(secondLines);
System.out.println("Differences found:");
if(comparison != 0){
System.out.println("Line "+lineNum);
System.out.println("<"+firstLines);
System.out.println(">"+secondLines);
System.out.println(" ");
}
break;
}
}
public static void main (String[]args)
throws FileNotFoundException, IOException{
Scanner userFile1=null,userFile2=null;
Scanner console = new Scanner(System.in);
System.out.println("Please enter the name of the first file: ");
System.out.flush();
try{
String filename =console.nextLine();
File firstFile = new File(filename);
userFile1 = new Scanner(firstFile);}
catch(Exception e){e.printStackTrace();}
System.out.println("Please enter the name of the second file: ");
try{
File secondFile = new File(console.nextLine());
userFile2 = new Scanner(secondFile);
}
catch(Exception e1){
e1.printStackTrace();}
finally{
console.close();}
differences(userFile1, userFile2);
}
}