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Running
Running
File size: 1,459 Bytes
6a0d5f3 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | size
ArrayList<Integer> numbers = new ArrayList<>();
numbers.add(10);
numbers.add(5);
System.out.println(numbers.size()); //2
for(int i=0; i<5; i++) {
numbers.add(i);
}
System.out.println(numbers); //[10, 5, 0, 1, 2, 3, 4]
int len = numbers.size();
System.out.println(len); //7
Program outputs:
2
[10, 5, 0, 1, 2, 3, 4]
7
==================================
i<numbers.size()
ArrayList<Integer> numbers = new ArrayList<>();
numbers.add(10);
numbers.add(5);
numbers.add(6);
numbers.add(22);
numbers.add(-4);
System.out.println(numbers); //[10, 5, 6, 22, -4]
for (int i=0; i<numbers.size(); i++) {
numbers.set(i, numbers.get(i) + 1);
}
System.out.println(numbers); //[11, 6, 7, 23, -3]
Program outputs:
[10, 5, 6, 22, -4]
[11, 6, 7, 23, -3]
==================================
for loop - iterate through each element
ArrayList<Integer> numbers = new ArrayList<>();
numbers.add(10);
numbers.add(5);
numbers.add(6);
numbers.add(22);
numbers.add(-4);
for (int number : numbers) {
System.out.println(number);
}
Program outputs:
10
5
6
22
-4
==================================
SUM length of ALL words
ArrayList<String> words = new ArrayList<>();
words.add("Lake");
words.add("Swamp");
words.add("Hoe");
words.add("Shovel");
int length = 0;
for (String word : words ) {
length = length + word.length();
}
System.out.println("Combined length: " + length );
Program outputs:
Combined length: 19
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