Please Help Me Debug This Java(source Code)program! It Can Be Compiled,but It Does Not Run!!!?
***after i compiled this as javac go.java, it has no errors, but when I want to run this already as ” java go ” it cannot be run. there says Exception in thread “main” java.lang.ArrayIndexOutOfBoundsException… 0 at go.main(go.java:3)
***here’s the source code: (please do help me debug and run this JAVA program please)
class go{
public static void main(String [] args){
String s = args[0];
int[] f = tally(s);
}
static int[] tally(String s){
int[] f = new int[26];
s = s.toUpperCase();
for(int i=0; i<s.length();i++){
char ch = s.charAt(i);
if (Character.isLetter(ch)){
int j = ch – 'A';
++f[j];
}
}
return f;
}
static void print(int[] f){
for(int j=0; j0)
System.out.println(ch +”: “+f[j]);
}
}
}
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4 Responses to “Please Help Me Debug This Java(source Code)program! It Can Be Compiled,but It Does Not Run!!!?”.
look to this sample program:
public class Test {
public static void main(String args[]) {
System.out.println(“Hello There “+ args[0] +” “+args[1]);
}
}
To run this class after compiling it, you will specify two arguments e.g.
java Test Joe Blogg
It will print
Hello There Joe Blogg where args[0] = Joe and args[1] = Blogg
in ur program u r not passing any argument while executing it.
as on the third line :- String s=args[0];
if u will not pass any argument for array args[] then it will throw ArrayIndexOutOfBound exception. Hope u get it.
you need to type in java go, where is any number, the program needs a number to tally.
The problem is that your program is expecting an argument but you’re not passing in an argument. The line that is looking for an argument:
…
public static void main(String [] args){
String s = args[0]; <— Here you are looking for an argument
…
Perhaps try something like “java go Whatever”.
in the command line, try to run ur program as:
java go “test”
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