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Exercise 6.11: stripComments
I am trying to resolve a problem on the website called Practice-It:
Write a method called stripComments that accepts a Scanner representing an input file containing a Java program as its parameter, reads that file, and then prints the file's text with all comments removed. A comment is any text on a line from // to the end of the line, and any text between /* and */ characters. For example, consider the following text:
import java.util.*;
/* My program
by Suzy Student */
public class Program {
public static void main(String[] args) {
System.out.println("Hello,
}
public static /* Hello there */ void foo() {
System.out.println("Goodby
} /* */
}
If the file contained this text, your program should output the following text:
import java.util.*;
public class Program {
public static void main(String[] args) {
System.out.println("Hello,
}
public static void foo() {
System.out.println("Goodby
}
}
I am not a student but am trying to learn coding on my own.
I would appreciate some guidance.
Write a method called stripComments that accepts a Scanner representing an input file containing a Java program as its parameter, reads that file, and then prints the file's text with all comments removed. A comment is any text on a line from // to the end of the line, and any text between /* and */ characters. For example, consider the following text:
import java.util.*;
/* My program
by Suzy Student */
public class Program {
public static void main(String[] args) {
System.out.println("Hello,
}
public static /* Hello there */ void foo() {
System.out.println("Goodby
} /* */
}
If the file contained this text, your program should output the following text:
import java.util.*;
public class Program {
public static void main(String[] args) {
System.out.println("Hello,
}
public static void foo() {
System.out.println("Goodby
}
}
I am not a student but am trying to learn coding on my own.
I would appreciate some guidance.
public static void stripComments(Scanner input){
String line = "";
while(input.hasNextLine()){
line = input.nextLine();
if(line.contains("/*") && !line.contains("*/" )){
System.out.println();
}else if( line.contains("*/")){
}else if(line.contains("//") ){
int index = line.indexOf("//");
System.out.println(line.substring(index-index, index));
}
else{
System.out.println(line);
}
}
}SOLUTION
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ASKER CERTIFIED SOLUTION
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This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
I only supplied that because the asker stated he was not a student in his initial question but was trying to learn using a practice website.
ASKER
Thanks awking00 for your help and did not mean to violate any terms. I was able to solve my problem.
public static void stripComments(Scanner input){
//FLAG TO CHECK IF MARKER WAS FOUND
// /* OR */
boolean markerFound = false;
while(input.hasNextLine()){
//PLACE LINE IN VARIABLE
String line = input.nextLine();
if(markerFound == false && !line.contains("//") && !line.contains("/*") && !line.contains("*/")){
System.out.println(line);
}else {
if(line.startsWith("/*")){
System.out.print("");
markerFound = true;
}else if(!line.contains("/*") && line.endsWith("*/")){
System.out.println();
markerFound = false;
}else if (line.contains("//")){
int index = line.indexOf('/');
System.out.println(line.substring(0,index));
}else {
int index = line.indexOf("/*");
int index2 = line.indexOf("*/");
System.out.println(line.substring(0, index) + "" + line.substring(index2 + 2,line.length()) );
}
}
}
}ASKER
Thanks Netminder
I would like to know what would be appropriate way of asking my questions. I am not trying to violate any terms but I am self teaching myself java. I ordered the Building Java Programs book from Amazon and do not have the aid of a teacher but need to respect EE policies. The book uses the practice it website to aid in learning.
Should I state in my questions do not supply solution but point out my mistakes or something to that nature?
I would like to know what would be appropriate way of asking my questions. I am not trying to violate any terms but I am self teaching myself java. I ordered the Building Java Programs book from Amazon and do not have the aid of a teacher but need to respect EE policies. The book uses the practice it website to aid in learning.
Should I state in my questions do not supply solution but point out my mistakes or something to that nature?
ASKER
Okay, I understand now. I will post where the material comes from and mention that I want guidance not a solution.
ASKER
awking00, I don't see the attachment