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Mod 7 quicksort

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jugal 2025-03-09 17:58:29 +05:30
parent 67a7b0e096
commit 96ce281b20
1 changed files with 48 additions and 1 deletions
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47
module7/src/main/java/com/hithomelabs/princeton1/module7/Quick.java
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@ -2,10 +2,57 @@ package com.hithomelabs.princeton1.module7;
import com.hithomelabs.princeton1.module5.AbstractCustomSorts;
import java.util.Arrays;
import java.util.Collections;
import java.util.Random;
public class Quick<E> extends AbstractCustomSorts<E> {
@Override
public void sort(E[] arr) {
// Collections.shuffle(Arrays.asList(arr));
sort(arr, 0, arr.length-1);
}
public void sort(E[] arr, int lo, int hi){
if(lo>=hi) return;
int pivot = partition(arr, lo, hi);
sort(arr, lo, pivot-1);
sort(arr, pivot+1,hi);
}
private int partition(E[] arr, int lo, int hi){
int pivot=lo, i=lo, j=hi+1;
while(i<j){
while(less((Comparable<E>) arr[++i], arr[pivot]))
if(i == hi) break;
while(less((Comparable<E>) arr[pivot], arr[--j]))
if(j == lo) break;
if(i>=j) break;
exch(arr,i, j);
}
exch(arr,pivot,j);
return j;
}
// public static void main(String[] args){
// Integer[] arrTest = new Integer[6];
//
// for(int i=0;i<6;i++){
// arrTest[i] = new Random().nextInt(100);
// System.out.println(arrTest[i]);
// }
//
// System.out.println();
//
// Quick<Integer> sortAlgo = new Quick<>();
//
// sortAlgo.sort(arrTest);
//
// for(Integer i: arrTest)
// System.out.println(i);
// }
}