-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathActivity_Selection.java
More file actions
67 lines (52 loc) · 1.72 KB
/
Activity_Selection.java
File metadata and controls
67 lines (52 loc) · 1.72 KB
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
package com.dsj.gp;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;
public class Activity_Selection {
int numOfActivities;
Scanner sc;
List<Activity_Sel_Pair> listOfActivities = new ArrayList<>();
public Activity_Selection() {
System.out.println("Enter the number of activities: ");
sc = new Scanner(System.in);
numOfActivities = sc.nextInt();
takeInput();
activitySelection();
}
private void activitySelection() {
//At least one activity can be performed.
int maxActivities = 1;
sortListByFinishTime();
System.out.println("Activities to perform are: ");
int helper = 0;
listOfActivities.get(helper).display();
for (int itr = 1; itr < numOfActivities; itr++) {
if (listOfActivities.get(helper).finishValue <= listOfActivities.get(itr).startValue) {
maxActivities++;
helper++;
listOfActivities.get(itr).display();
}
}
System.out.println("The maximum activities that can be performed are: " + maxActivities);
}
/**
* Sort the list of "Pair" objects based on its finish times.
*/
private void sortListByFinishTime() {
Collections.sort(listOfActivities, Comparator.comparing(Activity_Sel_Pair::getFinishValue));
}
/**
* For the {@link numOfActivities}, loop through to get pair of Start and
* finish times.
*/
private void takeInput() {
for (int i = 0; i < numOfActivities; i++) {
System.out.println(MessageFormat.format("Enter activity no: {0}''s start time and finish time:", i + 1));
listOfActivities.add(new Activity_Sel_Pair(sc.nextInt(), sc.nextInt()));
}
sc.close();
}
}