Something is wrong with this code. Can someone help?

Question

Hi GUYS. TODAY I CREATED A CODE USING JAVA. I STARTED THE JAVA COURSE JUST 3 DAYS AGO. I MADE MY FIRST CODE AND THIS WAS GOING TO BE MY SECOND CODE. BUT UNFORTUNATELY, I GOT 26 ERRORS!!! I RALLY WANT TO FIX THIS THE IDEA JUST SEEMES SO GREAT. CAN SOMEONE PLEASE HELP. HERE IS THE CODE:
public class Ninja {
void attack(){
System.out.println("Attack!");
}
void defend(){
System.out.println("Enemy is attacking. Initiate all shields!");
}
void win(){
System.out.println("We won");
}
void lose(){
System.out.println("We lost");
}
}
public class Enemy{
void attack(){
System.out.println("Enemy is attacking us");
}
void retreat(){
System.out.println("Enemy is retreating!");
}
void defend(){
System.out.println("Enemy is blocking our attack");
}
}
public static void main(String[] args) {
Ninja ninja = new Ninja();
Enemy enemy = new Enemy();
int x = 2;
switch(x){
case 1:
ninja.attack();
enemy.defend();
ninja.attack();
ninja.win();
break;
case 2:
enemy.attack();
ninja.defend();
ninja.lose();
break;
case 3:
ninja.attack();
ninja.attack();
enemy.defend();
enemy.retreat();
ninja.win();
break;
case 4:
enemy.attack();
ninja.defend();
enemy.attack();
ninja.lose();
break;
case 5:
ninja.attack();
enemy.defend();
enemy.defend();
ninja.attack();
enemy.retreat();
ninja.win();
break;
}
}
}
I WOULD REALLY APPRICIATE IF YOU HELPED. THANKS 😊

Answer 1

https://code.sololearn.com/chgh7SQZN5V0/?ref=app

Answer 2

Here is the code in the code playground:
https://code.sololearn.com/czW576sc6zMu/?ref=app