CODEWITHSUNDEEP
javacompiler-errorsunreachable-code
DevanDev
DevanDev

Reputation: 355

Java:Unreachable statement error

for the following code mentioned below ,I have been obtaining the Error " Unreachable statement error " at " Return Cols " statement

The code computes the position of Maximum Dose in a generated Output CSV file

public int getPosition() {

        double dose = 0.0;
        double position = 0.0;
        int rows = 0;
        int cols = 0;

        String s;

        for (int j = 1; j < nz; j++) {
            s = "";
            for (int i = 1; i < nx; i++) {
                for (DetEl det_el : det_els) {
                    if (det_els.get(j + i * nz).getDose() == getMaxDose()) {
                        i=rows;
                        j=cols;
                    }
                    // comma separated or Semicolon separated mentioned here
                }
                // prints out the stream of  values in Doses table separated by Semicolon
            }
        }
        return rows;
        return cols;//unreachable statement error obtained at this position.
    }

Any help is greatly appreciated

Upvotes: 0

Views: 141

Answers (3)

Ruchira Gayan Ranaweera
Ruchira Gayan Ranaweera

Reputation: 35587

You can't do this.

return rows; // when your program reach to this your program will return
return cols; // then never comes to here

If you want to return multiple values from a method, you can use a Array or your own Object

Eg:

public int[] getPosition(){
  int[] arr=new int[2];
  arr[0]=rows;
  arr[1]=cols;
  return arr;       
}

You should read this.

Upvotes: 3

Deval Khandelwal
Deval Khandelwal

Reputation: 3548

You have already breaked from the code using return rows;. This statement returns to the caller. So, a statement after return rows; is inaccessible

Upvotes: 1

kirti
kirti

Reputation: 4609

After return the code is not proceeded further thats why it is giving unreachable code error there coz u are returning rows and code exits there and thus return coloumns will not reached 

public int getPosition() {

        double dose = 0.0;
        double position = 0.0;
        int rows = 0;
        int cols = 0;


        String s;


        for (int j = 1; j < nz; j++) {
            s = "";

            for (int i = 1; i < nx; i++) {

                for (DetEl det_el : det_els) {

                    if (det_els.get(j + i * nz).getDose() == getMaxDose()) {


                        i=rows;
                        j=cols;





                    }
                    // comma separated or Semicolon separated mentioned here
                }

                // prints out the stream of  values in Doses table separated by Semicolon
            }

        }
        return rows;// code ends here itself thats why return cols is unreachable

        return cols;//unreachable statement error obtained at this position.
    }

Upvotes: 1

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