Compare and Merge Source Code Files in Java

compare-and-merge-code.java

//Instantiate Comparer object with source document path or stream;
try (Comparer comparer = new Comparer(SourceFile)) {
// Invoke add method and specify target document path or stream.
comparer.add(TargetFile);  
//Invoke compare method.
final Path resultPath = comparer.compare(ResultPath);        
} 

compare-and-merge-source-code-files.java

//Initialize Comparer object with source file path
try (Comparer comparer = new Comparer(sourcePath)) {
//Invoke [add][] method and specify target file path.
 comparer.add(targetPath);
//Call compare method
final Path resultPath = comparer.compare(outputPath);
//Get the list of changes by using getChanges method
ChangeInfo[] changes = comparer.getChanges();
//Set ComparisonAction of needed change object to ComparisonAction.ACCEPT  value.
for (int i = 0; i < 10; i++) {
    changes[i].setComparisonAction(ComparisonAction.ACCEPT);
 }
//Set ComparisonAction of needed change object to ComparisonAction.REJECT value.
for (int i = 10; i < changes.length; i++) {
    	changes[i].setComparisonAction(ComparisonAction.REJECT);
}
// Call applyChanges method and pass collection of changes to it.
comparer.applyChanges(resultPath, new ApplyChangeOptions(changes));
}

get-list-of-changes.java

//Initialize Comparer object with source file path
try (Comparer comparer = new Comparer(sourceFile)) {
//Invoke [add][] method and specify target file path.
comparer.add(targetFile);
//Call compare method
final Path resultPath = comparer.compare();
//Get the list of changes by using getChanges method
ChangeInfo[] changes = comparer.getChanges();
//Display the changes count
System.out.println("Count of changes: " + changes.length);
}