how compare array of string

[federico momon]

i would like 2 know how do we compare array of string.
i have 2 array of string and my scenario will compare the element of 1st array
with element of 2nd array then delete the string that match with the second array.
the code what i have is given below..
if there's better ways, maybe you can share to me..

-thanks-

package hplag;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class Function {
public static void baca(String path) throws IOException {
try {
FileInputStream fis = new FileInputStream(path);
FileInputStream stoplist = new FileInputStream("D:/study/stopword.txt");
StringBuffer newString = new StringBuffer();
StringBuffer newStop = new StringBuffer();
char current;
while (fis.available() > 0) {
current = (char) fis.read();
if (!(current=='*' || current=='(' || current==')' || current==',')){
newString.append(current);
}
}
char curstop;
while (stoplist.available() > 0) {
curstop = (char) stoplist.read();
newStop.append(curstop);
}
String [] temp = null;
String now = newString.toString();
now=now.toLowerCase();
temp = now.split("\\s+");
String [] tempstop = null;
String nowstop = newStop.toString();
tempstop = nowstop.split("\\s+");
for (int j = 0 ; j < tempstop.length ; j++) {
String data1=tempstop[j].toLowerCase();
// i'm stuck here.. :(
}
}catch (IOException e) {
e.printStackTrace();
}
}
}

[Ankit Garg]

Hi federico, welcome to javaranch.

I think you should use dynamically re-sizable array counterparts like java.util.ArrayList or something of that sort to achieve this. That way, you can insert unique elements from the first array to the list like this

for(/*iterate over the first array*/) {
if(!Arrays.binarySearch(secondArray, firstArray[i]) {
the current element is unique in the first list
}
}

Try to think of how you can implement this concept...

[Campbell Ritchie]

When you get to the level of chars you are not really dealing with characters. You are dealing with numbers. You can do arithmetic on them. Try this

System.out.println('a' - 'b');

[federico momon]

 

Ankit Garg wrote:Hi federico, welcome to javaranch.

I think you should use dynamically re-sizable array counterparts like java.util.ArrayList or something of that sort to achieve this. That way, you can insert unique elements from the first array to the list like this

for(/*iterate over the first array*/) {
if(!Arrays.binarySearch(secondArray, firstArray[i]) {
the current element is unique in the first list
}
}

Try to think of how you can implement this concept...

thanks Ankit
hm...i have try your sugestion, but what does it mean "the current element is unique in the first list" ?
i still don't get it, could you give me by example

Campbell Ritchie wrote:When you get to the level of chars you are not really dealing with characters. You are dealing with numbers. You can do arithmetic on them. Try this

System.out.println('a' - 'b');

thanks bro..
but i've try and did'nt work.
could you give me by example too, based on my code

sorry i'm just newbie

[Campbell Ritchie]

We don't give out complete answers, only hints. You learn a lot better like that.

public class CharacterArithmetic
{
public static void main(String[] args)
{
System.out.println('a' - 'b');
}//end main
}//end class

Works nicely. You will have to use that to produce a result for your comparisons.