at java.util.TimSort.mergeHi(TimSort.java:899) [rt.jar:1.8.0_65] at java.util.TimSort.sort(TimSort.java:254) [rt.jar:1.8.0_65]
at java.util.Arrays.sort(Arrays.javajava</
public class MyComparable implements Comparator<TestVo>{ public int compare(TestVo vo1, TestVo vo2) { if(vo1.getId().compareTo(vo2.getId()) != 0){
ret = vo1.getId().compareTo(vo2