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TurkuBasicOOPinJava / Week 3: Objects, files and exceptions

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Math.PI; Math.pow

d81e700 verified 6 months ago

10. Array from list

2.2 kB

Create 10. Array from list 6 months ago
11a Hashmap

3.07 kB

HashMap<String, Integer>; put get containsKey keySet(=k ONLY) 6 months ago
11b. Combine names and grades

2.21 kB

HashMap<String, Integer> map = new HashMap<>(); 6 months ago
12. Coldest city

2.68 kB

for (String city : cityNTemps.keySet()) 6 months ago
13a. Using existing libraries

537 Bytes

Random.nextInt(upToButNotIncl) 6 months ago
13b. Draw lottery numbers

2.74 kB

r.nextInt(39) 6 months ago
14a Class StringBuilder

1.96 kB

StringBuilder str = new StringBuilder("<urStr>"); 6 months ago
14b Starsquare

1.61 kB

Create 14b Starsquare 6 months ago
15a Math-library

558 Bytes

Math.PI; Math.pow 6 months ago
1a Objects and references

3.46 kB

obj1.equals(obj2) 6 months ago
1b. Calculator

2.14 kB

Create 1b. Calculator 6 months ago
2. Names to list - equals

2.05 kB

equals 6 months ago
3a. Objects as parameters and return values

679 Bytes

someMethod(ArrayList<Integer> list) 6 months ago
3b. Add sum to list - RECREATE LIST

2.15 kB

ArrayList<Integer> lista = new ArrayList<>(); for (int l : pa) lista.add(l); 6 months ago
4. Remove negative numbers - get, remove

2.49 kB

get, remove 6 months ago
5a. Method side effects

1.11 kB

eg change order 6 months ago
5b. Second smallest without side effects

2.2 kB

Collections.min/max, THEN go through list to find secondSmallest 6 months ago
6B. Create a list

2.04 kB

Create 6B. Create a list 6 months ago
6a. Objects as return values

1.8 kB

ArrayList<String> list = new ArrayList<>(); 6 months ago
7. Convert to a number list

3.06 kB

"" + someInt; Integer.parseInt(str) 6 months ago
8. Combine lists

2.99 kB

newList.addAll(list1); Collections.sort(newList) 6 months ago
9a. Data structure - ARRAY

3.36 kB

String[] names = new String[16]; arr.length; list.size(); str.length(); 6 months ago
9b. Sum of array elements

1.28 kB

Create 9b. Sum of array elements 6 months ago