I can’t figure out what I am doing wrng
my code is
import java.util.*;
public class b {
void sort(String a[])
{
int n=a.length;
for(int j=0;j<n;j++){
for(int i=0;i<n-1-j;i++)
{
if((int)(a[i].charAt(0))>(int)(a[i+1].charAt(0))){
String s=a[i];
a[i]=a[i+1];
a[i+1]=s;}
}
}
for(int i=0;i<n-1;i++) {
if ((int) (a[i].charAt(0)) == (int) (a[i + 1].charAt(0))) {
int l = a[i].length();
int l1 = a[i + 1].length();
if (l < l1) {
if (a[i].equals(a[i + 1].substring(0, l))) {
String s = a[i];
a[i] = a[i + 1];
a[i + 1] = s;
}
}
}
}
}
public static void main(String args[]) {
Scanner obj=new Scanner(System.in);
int n=obj.nextInt();
b m=new b();
String a[]=new String[n];
for(int i=0;i<n;i++)
{
a[i]=obj.next();
}
m.sort(a);
for(int i=0;i<n;i++)
{
System.out.println(a[i]);
}
}
}