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package Chapter1_Sort;

import java.util.Comparator;

public class th2_Comparable implements Comparator<Integer> {

// 比较器

// 如果小于，在前面；如果大于在后面；否则前后无所谓。

@Override

public int compare(Integer o1, Integer o2) {

if (o1>o2){

return 1;

}

if (o1<o2){

return -1;

}

return 0;

// 等价：return o1-o2;

// 等价：return o1.compareTo(o2);

}

}