Question

I’m just starting a unit in Arrays and I was given some example code to look off of for this very basic introductory program for Arrays. Essentially all I have to do is make two arrays that ask for the temperature for that day of the week. After collecting the info it will simply spit it back out in a string like this.

The temperature on Monday was 16 degrees

The temperature on Tuesday was 18 degrees

… etc.

From what I understood from the example code I received I am doing everything correctly. But when try to run the program (in Netbeans) I get this error.

“Exception in thread “main” java.lang.ArrayIndexOutOfBoundsException: 7
at temperatures.Temperatures.main(Temperatures.java:27)
Java Result: 1″

Here is the code:

public static void main(String[] args)throws IOException {
        // TODO code application logic here
        BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        String temp[]= new String[7];
        String day[]= new String[7];
        day[1]=("Monday");
        day[2]=("Tuesday");
        day[3]=("Wednesday");
        day[4]=("Thursday");
        day[5]=("Friday");
        day[6]=("Saturday");
        day[7]=("Sunday");
        for (int i=0; i <7; i++){
            System.out.println("Please enter the temperature for" + day[i]);
            temp[i]=br.readLine();
        }
        for (int i=0; i <7; i++){
        System.out.println("The high temperature on " + day[i]+ " was "+ temp[i]);
        }
    }
}

Answer 1

Arrays begin at zero (<- that’s a link to an article which explains why). So assigning your first value as day[1]=("Monday"); is the issue, it should be day[0]=("Monday"); Hope that helps