Where is the error in the simplest JAVA script?

Question

Java

Compiled ideone.com/gA6knT Script
:

class HelloWorld {
    public static void main(String[] args) {
        // int x = 10;

        for (int x = 1; x<11; x=x+1){
        	
          if(x==1){
          	String name = "бутылка";
          }
          if(x==2 | x==3 | x==4){
          	String name = "бутылки";
          }
          if(x > 4 & x < 21){
          	String name = "бутылок";
          }
          
        System.out.println("У нас есть " + x + name);
        }
        
    }
}

He says that the name variable is missing, as I understand it (cannot find symbol symbol: variable name), so it seems to be defined for all variants present in the cycle ...
The second question: in line 3, int x = 10 is commented out; if you uncomment it, it swears at for (int x = 1 and says that the variable is already defined above. So JAVA does not support redefinition like in php or is it somehow done differently?

Answer 1

1. The problem is in the scope of the name variable. Take out String name = null; before the loop, and in the loop already define it (name = ....)
2. use for(x =1; x<11; x++)

Answer 2

That's what you have to beat on the hands.
And yes, read about variable scopes.