bardackx / tiebreaker Goto Github PK

  public static void main(String[] args) {

    List<Account> accounts = new ArrayList<>();

    Account account = new Account();
    account.setNumber(null);
    account.setId(1L);

    Account account1 = new Account();
    account1.setNumber(50);
    account1.setId(1L);

    accounts.add(account);
    accounts.add(account1);

    Tiebreaker<Account> tiebreaker = new Tiebreaker<>();
    tiebreaker.ascending(Account::getId);
    tiebreaker.ascending(Account::getNumber);

    List<Account> sorted = tiebreaker.sort(accounts);
    System.out.println(sorted);
  }

Exception in thread "main" java.lang.NullPointerException
	at com.bardackx.tiebreaker.Tiebreaker.lambda$sort$4(Tiebreaker.java:78)
	at java.base/java.util.TimSort.countRunAndMakeAscending(TimSort.java:360)
	at java.base/java.util.TimSort.sort(TimSort.java:220)
	at java.base/java.util.Arrays.sort(Arrays.java:1515)
	at java.base/java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:353)
	at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:258)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at com.bardackx.tiebreaker.Tiebreaker.sort(Tiebreaker.java:84)
	at com.bardackx.tiebreaker.Tiebreaker.sort(Tiebreaker.java:106)
	at com.bardackx.tiebreaker.App.main(App.java:32)