KaiquanMah/TurkuBasicOOPinJava at a931ec53744f50af8220e33b7ef5a79469e989a2

TurkuBasicOOPinJava / Week 3: Objects, files and exceptions

51.7 kB

1 contributor

History: 29 commits

KaiquanMah

Scanner reader = new Scanner(new File("fileName.txt")); list.add(reader.nextLine());

a931ec5 verified 7 months ago

10. Array from list

2.2 kB

Create 10. Array from list 7 months ago
11a Hashmap

3.07 kB

HashMap<String, Integer>; put get containsKey keySet(=k ONLY) 7 months ago
11b. Combine names and grades

2.21 kB

HashMap<String, Integer> map = new HashMap<>(); 7 months ago
12. Coldest city

2.68 kB

for (String city : cityNTemps.keySet()) 7 months ago
13a. Using existing libraries

537 Bytes

Random.nextInt(upToButNotIncl) 7 months ago
13b. Draw lottery numbers

2.74 kB

r.nextInt(39) 7 months ago
14a Class StringBuilder

1.96 kB

StringBuilder str = new StringBuilder("<urStr>"); 7 months ago
14b Starsquare

1.61 kB

Create 14b Starsquare 7 months ago
15a Math-library

558 Bytes

Math.PI; Math.pow 7 months ago
15b. Math-class methods

378 Bytes

abs exp log floor max signum negateExact 7 months ago
16a Files and exceptions

876 Bytes

Create 16a Files and exceptions 7 months ago
16b. Players from FILE

2.07 kB

Scanner reader = new Scanner(new File("fileName.txt")); list.add(reader.nextLine()); 7 months ago
1a Objects and references

3.46 kB

obj1.equals(obj2) 7 months ago
1b. Calculator

2.14 kB

Create 1b. Calculator 7 months ago
2. Names to list - equals

2.05 kB

equals 7 months ago
3a. Objects as parameters and return values

679 Bytes

someMethod(ArrayList<Integer> list) 7 months ago
3b. Add sum to list - RECREATE LIST

2.15 kB

ArrayList<Integer> lista = new ArrayList<>(); for (int l : pa) lista.add(l); 7 months ago
4. Remove negative numbers - get, remove

2.49 kB

get, remove 7 months ago
5a. Method side effects

1.11 kB

eg change order 7 months ago
5b. Second smallest without side effects

2.2 kB

Collections.min/max, THEN go through list to find secondSmallest 7 months ago
6B. Create a list

2.04 kB

Create 6B. Create a list 7 months ago
6a. Objects as return values

1.8 kB

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

3.06 kB

"" + someInt; Integer.parseInt(str) 7 months ago
8. Combine lists

2.99 kB

newList.addAll(list1); Collections.sort(newList) 7 months ago
9a. Data structure - ARRAY

3.36 kB

String[] names = new String[16]; arr.length; list.size(); str.length(); 7 months ago
9b. Sum of array elements

1.28 kB

Create 9b. Sum of array elements 7 months ago