Running code Fine But Test not passes
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int t = sc.nextInt();
while(t!=0){
int n = sc.nextInt();
String[] A = new String[n];
for(int i=0;i<n;i++) {
A[i]=sc.next();
}
for(int i=0;i<n-1;i++){
for(int j=0;j<n-1-i;j++){
if(compare(A[j],A[j+1])==false){
swap(A,j,j+1);
}
}
}
for(int i=0;i<n;i++){
System.out.print(A[i]);
}
t–;
}
}
public static void swap(String arr[],int a,int b){
String temp =arr[a];
arr[a]=arr[b];
arr[b]=temp;
}
public static boolean compare(String a,String b){
a = a+b;
b = b+a;
if(a.compareTo(b)>0){
return true;
}
else
return false;
}}