[Java] PS Coding Tip(~ing)

.입출력

.입출력

- BufferedReader

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int T = Integer.parseInt(br.readLine());    // int
String str = br.readLine();    // string
 
StringTokenizer st = new StringTokenizer(br.readLine());
int N = Integer.parseInt(st.nextToken()); 
int M = Integer.parseInt(st.nextToken()); 

- Scanner

Scanner sc = new Scanner(System.in);
int T = sc.nextInt();    // int
String str = sc.next();    // string

- 배열 원소 확인(Test)

System.out.println(Arrays.toString(chk));

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.자료형

.String to Char

char motion[] = br.readLine().toCharArray();

.Object Sort

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public static class Student implements Comparable<Student>{     int mid,finals,assign,index;     int score;     public Student(int mid,int finals,int assign,int index){         this.mid = mid;         this.finals = finals;         this.assign = assign;         this.index = index;         score =mid*35 + finals*45 + assign*20;     }       @Override     public int compareTo(Student o) {         return score - o.score;     } } Colored by Color Scripter

cs

.2차원 ArrayList

ArrayList<Integer> nodes[] = new ArrayList[N];
 
for (int i = 0; i < N; i++) 
        nodes[i] = new ArrayList<Integer>();

.Iterator

public void printPatientList() {
    Iterator<Patient> itr = patientList.iterator();
    while(itr.hasNext()){
        Patient p = itr.next();
        System.out.println(p);          
    }
}

.메모리

.배열 메모리 초기화

Arrays.fill(chk, 0);

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