Structuring Data with Java - Java - page 265

s1 = s1 . substring ( 1 );
s2 = s2 . substring ( 1 );
return return s1 . compareTo ( s2 );

// or, more concisely:
// return s1.substring(1).compareTo(s2.substring(1));

}

}

Using it is just a matter of passing it as the Comparator argument to the correct form of
sort() , as shown here:

public public class class SubstrCompDemo SubstrCompDemo {

public public static void main ( String [] unused ) {

String [] strings = {
"painful" ,
"mainly" ,
"gaining" ,
"raindrops"

static void

};
Arrays . sort ( strings );
dump ( strings , "Using Default Sort" );
Arrays . sort ( strings , new

new SubstringComparator ());
dump ( strings , "Using SubstringComparator" );

}
static

static void void dump ( String [] args , String title ) {

System . out . println ( title );
for for ( int int i = 0 ; i < args . length ; i ++)

System . out . println ( args [ i ]);

}

}

Here is the output of running it:

$ java structure.SubstrCompDemo
Using Default Sort
gaining
mainly
painful
raindrops
Using SubstringComparator
raindrops
painful