Java Arrays Index out of Bounds

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

Answer 2

Arrays in Java start at position 0, not position 1. So if you initialize it to a size of 7, Monday is 0 and Sunday is 6. There is no index 7 available.

Answer 3

The arrays starter in 0,

try this

    day[0]=("Monday");
    day[1]=("Tuesday");
    day[2]=("Wednesday");
    day[3]=("Thursday");
    day[4]=("Friday");
    day[5]=("Saturday");
    day[6]=("Sunday");

and should you change this loop

for(int i=0; i < 7; i++){
        System.out.println("Please enter the temperature for" + day[i]);
        temp[i]=br.readLine();
    }

for this

for(int i=0; i < day.length(); i++){
        System.out.println("Please enter the temperature for" + day[i]);
        temp[i]=br.readLine();
    }

I hope help you.