35 lines
1023 B
Java
35 lines
1023 B
Java
package Sorting;
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public class WordQuickSorterThreeWay extends WordQuickSorter {
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public WordQuickSorterThreeWay(RandomWordFileReader reader) {
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super("quick sort (3-way partition)", reader);
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}
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@Override
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void quickSort(int lowIndex, int highIndex) {
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if (compare(lowIndex, highIndex)<0) {
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String pivot = words[highIndex];
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int lessThan = lowIndex;
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int greaterThan = highIndex;
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int i = greaterThan - 1;
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while(i >= lessThan) {
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int comp = compare(words[i], pivot);
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if(comp > 0) {
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swap(words, i, greaterThan);
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i--;
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greaterThan--;
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} else if(comp < 0) {
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swap(words, i, lessThan);
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lessThan++;
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} else {
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i--;
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}
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}
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quickSort(lowIndex, lessThan-1);
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quickSort(greaterThan+1, highIndex);
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}
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}
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} |