Java Programming Tutorial 46 - Quickly Initialize a List with Elements & How to Print List

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[Moooe-xrgj]

you can also just System.out.print(grades); since it is a list not an array, or you could

[mauriceallenliddy]

Hey Caleb, if you see this. When I used the following code:
List<Integer> grades = Arrays.asList(1, 3, 2, 8);
System.out.println(grades);
It printed out the list values as [1 3 2 8] just fine. How come you needed that line:
?

[marco]

Why was line 9 needed in this video? The integer array?

[thilansenanayake]

Writing grades.toString() works for the print method. We do not need to convert it back to an Array. Correct me if I'm wrong on this.

[ya-...]

I tried to just print it out like this and it worked for me the same as the other confusing method:
System.out.println(test); // test is my list

[deboking]

Earned yourself a subscriber. Great job explaining collection!!

[fahamalaamri]

I tried these methods and they all worked :
System.out.println(grades);


Is there any difference ?

[SkyeVintorez]

hey Caleb, is it okay if i use
sout(grade.toString());

its working, but i just want to know if its okay?

[joeloswin.j]

import java.util.Scanner;
import java.util.List;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Collections;

public class Exercise3
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
int size;
System.out.print("Enter the maximum number of elements for the List : ");
size = scan.nextInt();
List<Integer> grades = new ArrayList<Integer>();
System.out.println("Enter the elements for the List : ");

for(int i = 0; i < size; i++)
{
grades.add(i, scan.nextInt());
}

System.out.print("Enter an arithmetic operator : ");
char a = scan.next().charAt(0);

switch(a)
{
case '+':
for(int i = 0; i < size; i++)
{


, grades.get(i) + grades.get(i+1));
e){}
}

break;
case '-':
for(int i = 0; i < size; i++)
{


, grades.get(i) - grades.get(i+1));
e){}
}

break;
case '*':
for(int i = 0; i < size; i++)
{


, grades.get(i) * grades.get(i+1));
e){}
}

break;
case '/':
for(int i = 0; i < size; i++)
{


, grades.get(i) / grades.get(i+1));

e){}
}

break;
case '%':
for(int i = 0; i < size; i++)
{


, grades.get(i) % grades.get(i+1));
e){}
}

break;
default:
break;
}
}
}