Diff

java.lang.Object
- ptolemy.util.Diff

```
public class Diff
extends java.lang.Object
```
Read two files and compute the diff.
This file is based on http://introcs.cs.princeton.edu/96optimization/Diff.java, from 2011, see http://introcs.cs.princeton.edu/96optimization. A current copy may be found at http://introcs.cs.princeton.edu/java/23recursion/Diff.java.html

Since:

Ptolemy II 11.0

Version:

$Id$

Author:

Christopher Brooks

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Red (cxh)

Constructor Summary

Constructors
Constructor Description

Diff()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static java.lang.String`	`diff(java.lang.String aString, java.lang.String bString)`	Return the difference between two strings.
`static void`	`main(java.lang.String[] args)`	Print the difference between two files.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Diff
```
public Diff()
```
- Method Detail
  - diff
```
public static java.lang.String diff(java.lang.String aString,
                                    java.lang.String bString)
```
    Return the difference between two strings.
    
    Parameters:
    
    aString - The first string to be compared.
    
    bString - The secondString to be compared
    
    Returns:
    
    A string describing the difference between the two strings in a format similar to the Unix diff command.
  - main
```
public static void main(java.lang.String[] args)
                 throws java.net.MalformedURLException,
                        java.io.IOException
```
    Print the difference between two files.
    Usage:
    
    java -classpath $PTII ptolemy.util.test.Diff File1.txt File2.txt
    Parameters:
    
    args - An array of two elements, where the first element is the filename of the first file and the second element is the filename of the second file.
    
    Throws:
    
    java.net.MalformedURLException - If a file name cannot be converted into a URL.
    
    java.io.IOException - If a file cannot be read.