Help! my java program is getting errors!?

Help! my java program is getting errors!?
heres the source code.

/**
* @(#)barbaricsVocab.java
*
*
* @author
* @version 1.00 2009/1/2
*/

public class barbaricsVocab {

public barbaricsVocab() {
}
public static void main(String[] args) {

java.util.Scanner x = new java.util.Scanner(System.in); // console input
String word; //word
String pos; //part of speech
String pron; //pronunciation guide
int a = 0; //keeps while loop running.
String ab;
barbaricsVocab bv = new barbaricsVocab();

if (args.length > 0) {

word = args[0];

if (args.length > 1) {

pos = args[1];
pron= null;

if (args.length == 3) {

pron = args[2];

}

} else { //if the word is the only thing given, query for others.

System.out.println(“Please enter your word’s part of speech\n”);
pos = x.next();
System.out.println(“\n”);
System.out.println(“Please type your word’s pronunciation guide. (if you don’t have the pronunciation guide, type x.)\n”);
pron = x.next();
System.out.println(“\n”);
pron= null;
}

} else {

System.out.println(“Please type your word\n”);
word = x.next();
System.out.println(“\n”);
System.out.println(“Please enter your word’s part of speech\n”);
pos = x.next();
System.out.println(“\n”);
System.out.println(“Please type your word’s pronunciation guide. (if you don’t have the pronunciation guide, type x.)\n”);
pron = x.next();
System.out.println(“\n”);

}

int y = bv.finalOutput(word,pos,pron);

System.out.println(“Thank you for using barbarics vocab! \n”);

}

int finalOutput(String w, String p, String pr) {

int len = w.length();
int start = len – 2;
int end = len;
int dstbegin = 0;
char[] endchars = new char[3];

System.out.print(w+” “+p+” “+”(“);
if(pr.equals(“x”)!=true) {
System.out.print(pr);
}
System.out.println(“)\n”);

System.out.println(” ” ().\n”);

if ((p.equals(“n”))||(p.equals(“n.”))) {

System.out.println(w+” is \n”);
} else if ((p.equals(“adj”))||(p.equals(“adj.”))) {

System.out.println(w+” describes something that is \n”);
} else if ((p.equals(“v”))||(p.equals(“v.”))) {

System.out.println(“to “+w+” is to “);
} else if ((p.equals(“adv”))||(p.equals(“adv.”))) {
w.getChars(start, end,endchars , dstbegin);
if((endchars[0]==’l')&&(endchars[1]==’y')) {
System.out.println(“To do something “+w+” is to do something \n”);
} else {
System.out.println(“To do something in a “+w+” manner is to do something \n”);
}
} else {

System.err.println(“ERROR WITH PART OF SPEECH, CAN’T GENERATE DEFINITION\n”);
}

return 1;

}

}

It’s meant to have 3 command line arguments, and if i enter in 1, it works fine, but if i enter in the part of speech, (second arg) like this:

java barbaricsVocab fain adv.

i get this error:

fain adv. (Exception in thread “main” java.lang.NullPointerException
at barbaricsVocab.finalOutput(barbaricsVocab.java:93)
at barbaricsVocab.main(barbaricsVocab.java:70)

and it works fine when i enter in all three command line arguments like this.

java barbaricsVocab fain adv. feyn.

Best answer:

Piece of cake…. You wrote:

if (args.length > 1) {

pos = args[1];
pron= null;
[...]
so with two args, pron = null. You call finalOutput with pron and when you ref it, it’s null and you get the expected error. Instead, set it:

pron = “”;

Tags: errors, getting, HELP, java, program

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