missing variable

I wrote this method to take an int[]b then creates an array of int[] Per and fill it by taking each index i in b and uses another method to return an int value to be as an index of the new array Per with value of b[i], but the small and stupid problem is it says can't find symbol i in line Per [index-1]= b[i]; any idea

 public static int [] intial(int [] b)
      开发者_如何学JAVA  {   
            int [] Per =new int [64];
            int index;
            for(int i=0;i<b.length;i++)

                index=itable(i);
                Per [index-1]= b[i];


            return Per;
        }

---

Change

for(int i=0;i<b.length;i++)

    index=itable(i);
    Per [index-1]= b[i];

to

for(int i=0;i<b.length;i++) {
    index=itable(i);
    Per [index-1]= b[i];
}

Not including the braces { } in the loop make the compiler consider the first line only as the body of the loop and since i is a loop variable it wont be visible. Including the braces changes all this and make the two statement part of the loop body.

---

public static int [] intial(int [] b) {   
    int[] Per = new int[64];
    int index,b;
    for (int i=0; i<b.length; i++) {
        index=itable(i);
        Per[index-1] = b[i];
    }
    return Per;
}

---

I don't completely understand what you're trying to achieve, however the error you are getting is because you are re-declaring a variable named b. If you look you can see that you named the parameter to your method b, as well as declaring an int variable named b. To get this to compile you'll either need to rename the method parameter, or the local variable.

Additionally, if in the line Per [index-1]= b[i]; you intend to reference the local variable, you will need to change its declaration to be an array of int.

---

public static int [] intial(int [] b) 
        {    
            int [] Per =new int [64]; 
            int index; // varible b was atypo
            for(int i=0;i<b.length;i++){ //here was the error because i did not wrote {}

                index=itable(i); //method returns int value less than 64
                Per [index-1]= b[i]; }


            return Per; 
        }

---

I don't understand this line :

int index, b;

you are creating a second variable named "b", hiding the variable given as an argument (int[] b).

And please use lowercase letters at the beginning your variable names. "Per" is confusing, i thought it was a class name. Use "per" instead.

Here is a better version of what you are doing :

public static int [] intial(int [] b)
{   
    int [] per = new int [64];
    for(int i=0; i<b.length; ++)
        per [itable(i)-1]= b[i];

     return per;
}

---

EDIT : After the question is edited, I am not sure.

There are many things wrong in this.

public static int [] intial(int [] b)
    {   
        int Per []=new int [64];
        int index, b;  // b is redefined

        for(int i=0;i<b.length;i++)
            index=itable(i);    // what is itable???
            Per [index-1]= b[i];  // what is index??


        return Per;
    }

---

  public static int[] intial(int[] b) {
    int[] Per = new int[64];      
    for(int i = 0; i < b.length; i++)
      Per[itable(i)-1] = b[i];    
    return Per;
  }