Question

Syntax error on token ";", { expected after this token. 

I got this error on the 11th line and 19th line. Is there anyone can tell me what’s the problem with it？

import java.util.*;
class veding_machine{
    State st;
    veding_machine vm;
    private int price;
    private int k;
    private int k1;
    private int t;
    private int s;
    State Ls[]=new State[7]; // 11th line

    Ls[0]=idle;
    Ls[1]=coins_inserted;
    Ls[2]=sugar;
    LS[3]=nsc;
    Ls[4]=nlc;
    Ls[5]=et;
    Ls[6]=st; // 19th line

 public veding_machine(){        k=0;        k1=0;       t=0;        price=0;
            }

    public void setK(int k){
         this.k=k;
    }

Answer 1

The initialization of Ls should be inside the vending_machine constructor and should be creating instances of the classes “idle” and “coins_inserted”, etc…

Ls[0] = new idle();
Ls[1] = new coins_inserted();
Ls[2] = new sugar();
Ls[3] = new nsc();
Ls[4] = new nlc();
Ls[5] = new et();
Ls[6] = new st();

and these classes need to extend the State class

class idle extends State {
  // ...
}

They don’t need a state instance inside them.

    // removed, State st;
    public coins_inserted(){
      // removed, st=new State();
    }