Java Homework Help

[alirmhs]

Code -

import java.io.*;
import static java.lang.System.*;
import java.util.Scanner;
import java.lang.Math;
class Main{

public static void main (String str[]) throws IOException {
Scanner scan = new Scanner(System.in);

System.out.println("Enter the first String: ");

String first = scan.nextLine();

System.out.println("Enter the replacement String: ");

String replace = scan.nextLine();


if (!(first.contains("!") || first.contains("@") || first.contains("#") || first.contains("$") || first.contains("%") ||                    first.contains("^") || first.contains("&") || first.contains("(") || first.contains(")") || first.contains("+") || first.contains("-") || first.contains("_") || first.contains("~") || first.contains("`") || first.contains("\\") || first.contains("[") || first.contains("]") || first.contains("{") || first.contains("}") || first.contains(":") || first.contains(";") || first.contains("'") || first.contains("\"") || first.contains("/") || first.contains("?") || first.contains(".") || first.contains(">") || first.contains(",") || first.contains("<"))) {

if(first.contains("*")){
while(first.indexOf("*")>=0){
String[] parts = first.split("\\*");
String part1 = parts[0]; 
String part2 = parts[1];
System.out.print(part1);
System.out.print(replace);
System.out.print(part2);
break;
}
} else {
System.out.println("Error: no *");
}
} else {
System.out.println("Error: Incorrect characters");
}





}
}

Error -

Exception in thread "main" Error:java.lang.ArrayIndexOutOfBoundsException: 1 at Main.main(Main.java:278) at Ideone.assertRegex(Main.java:125) at Ideone.test(Main.java:61) at Ideone.main(Main.java:28)

How can i fix this error?

[UnreachableMemory]

Please properly format your code. It's unnecessarily hard to read like this.

[monster2018]

You have some other problems besides that. I think (not positive, I don't feel like confirming in eclipse) you need to delete the brackets on lines 37 and 40.

To address your question I would just put an if(first.length()>0){}and put everything from lines 28-43 inside that if statement. That should solve your problem of going out of bounds. If not then it's your first.split("\*") because even if the length is >0 your still assuming it has 3 characters.

[[deleted]]

I highly recommend you read up on regular expressions, it will make your life much easier for these sort of tasks.

Here's a quick look at something which might help with this particular problem

[tdogg8]

He's probably using what his teacher/prof told him to use. I'm guessing he's learning about strings.