So, I wrote a code which prints all possible combinations of a three lettered word. However, it displays the error message "erro

Question

import java.io.*;
public class Program
{
public static void main()
{
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
char a []=new char[3];
int i,j,c=0;
char ch;
String str;
System.out.println("Enter a 3-lettered string");
str=in.readLine();
for(i=0;i<3;i++)
{
ch=str.charAt(i);
a[c++]=ch;
}
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
System.out.print(a[i]);
if(i==j)
continue;
else
{
System.out.print(a[j]);
}
}
System.out.println();
}
}
}

Answer 1

readLine throws an exception so you need to handle Use a try {...existing code...} catch (Exception e) {}

Your main needs (String[] args)

Your print of a[i] needs to be moved to outer loop

Answer 2

looks like some good amount of logical as well as syntax error
1)see main method
2)again look at the way u are making combination
for 3 letter words ... combinations possible will be 9 (if letters can repeat) & 6 (if letters can't repeat)

Answer 3

Don't know if this will help too much, but try adding curly brackets to the if statement closer to the end of the code.