How to call an array from a static method? -

in code, how call array globally other methods use?

background info on code, asked scan file contains dna strands translating rna strand.

i receive error: " cannot find symbol - variable dna " when call dna array on translation method (it can't find dna.length) for(int i=0; < dna.length; i++){

public class filescannerexample  {      public static void main(string[] args) throws ioexception     {         //this how create scanner read file          scanner infile = new scanner(new file("dnafile.txt"));           string dnasequence = infile.next();         int dnalength = dnasequence.length();          string[] dna = new string[dnalength];          for(int i=0; i<=dna.length-2 ; i++)         {             dna[i]=dnasequence.substring(i,i+1); //looking ahead , taking each character , placing in array          }          dna[dna.length-1]=dnasequence.substring(dna.length-1); //reading last spot in order put in array           //testing array identical string         system.out.println(dnasequence);         for(int = 0 ; i<=dna.length-1; i++)         {             system.out.print(dna[i]);         }      }        public void  translation()     {           for(int i=0; < dna.length; i++){             //store temporary              if (dna[i] = "a"){                 dna[i] = "u";              }             if(dna[i] = "t"){                 dna[i] = "a";             }             if(dna[i] = "g"){                 dna[i]= "c";              }             if(dna[i] = "c"){                 dna[i] = "g";             }          }     }  } 

you need bring symbol scope before can reference it. can this, either pulling higher scope (as field in class), or sending local scope passing method parameter.

as class member:

public class test {     private string myfield;      void a() {         myfield = "i can see you";     }      void b() {         myfield = "i can see too";     } } 

as method parameter:

public class test {     void a() {         string myvar = "i can see you";         system.out.println(myvar);         b(myvar);     }      void b(string param) {         param += " too";         system.out.println(param);     } } 

note in order see instance member, must referencing non-static context. can around declaring field static too, although want careful static state in class, makes code more messy , harder work with.