How do I create a new list that contains multiple integers? thanks!
A line of code would also be greatly apreciated.
sengst wrote ...
2016/6/7
Help with Lists
If by 'list' you mean an array, you simply create one the way you do this in Java:
If, however, you're referring to the List object as found in the java.util package, you'd use the Integer class to store the integers:
You'd still have to import List and ArrayList, though, at the top of your 'file':
The only real reason you would want to use a List is if you badly wanted to have a variable size; an array can't change size, you'd have to create a new array for that. Using an array is the easiest (and least intensive) method, however.
1 2 3 4 5 6 7 | int[] integerArray = new int[5]; // an empty array that could store 5 intsint[] anotherArray = new int[]{ 1, 2, 10, 42 }; // an array with 4 specified elements// example usage:integerArray[0] = 5*7;integerArray[1] = 2 *integerArray[0];integerArray[2] = 10 -anotherArray[2]; |
1 2 3 4 5 | List<Integer> integerList = new ArrayList<Integer>();// example usage:integerList.add(5); // if I'm correct, the 5 will automatically be 'interpreted' as new Integer(5)integerList.add(99);int firstValue = integerList.get(0).intValue(); |
1 2 | import java.util.List;import java.util.ArrayList; |
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