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June 2018 Update

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Ingy döt Net 2018-06-22 20:57:24 +00:00
parent ba8067c3b7
commit 22f33d4004
5278 changed files with 84726 additions and 14379 deletions
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40
Task/Dutch-national-flag-problem/Java/dutch-national-flag-problem.java
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@ -6,41 +6,25 @@ public class DutchNationalFlag {
RED, WHITE, BLUE
}
public static void main(String[] args) {
public static void main(String[] args){
DutchColors[] balls = new DutchColors[12];
DutchColors[] values = DutchColors.values();
Random rand = new Random();
for (int i = 0; i < balls.length; i++)
balls[i] = values[rand.nextInt(values.length)];
for (int i = 0; i < balls.length; i++)
balls[i]=values[rand.nextInt(values.length)];
System.out.println("Before: " + Arrays.toString(balls));
dutchNationalFlagSort(balls);
Arrays.sort(balls);
System.out.println("After: " + Arrays.toString(balls));
System.out.println("After : " + Arrays.toString(balls));
}
private static void dutchNationalFlagSort(DutchColors[] items) {
int lo = 0, mid = 0, hi = items.length - 1;
while (mid <= hi)
switch (items[mid]) {
case RED:
swap(items, lo++, mid++);
break;
case WHITE:
mid++;
break;
case BLUE:
swap(items, mid, hi--);
break;
boolean sorted = true;
for (int i = 1; i < balls.length; i++ ){
if (balls[i-1].compareTo(balls[i]) > 0){
sorted=false;
break;
}
}
private static void swap(DutchColors[] arr, int a, int b) {
DutchColors tmp = arr[a];
arr[a] = arr[b];
arr[b] = tmp;
}
System.out.println("Correctly sorted: " + sorted);
}
}