如何打印按属性排序的对象数组？ [复制]

Question

我正在尝试打印按属性排序的对象数组，在本例中为 partDescription。我正在尝试使用流。

    public class ProcessInvoices {
       public static void main(String[] args) {
          List<Invoice> invoices = Arrays.asList(
             new Invoice("83", "Electric sander", 7, 57.98),
             new Invoice("7", "Sledge hammer", 11, 21.50),
             new Invoice("77", "Hammer", 76, 11.99),
             new Invoice("39", "Lawn mower", 3, 79.50),
             new Invoice("68", "Screwdriver", 106, 6.99),
             new Invoice("56", "Jig saw", 21, 11.00),
             new Invoice("3", "Wrench", 34, 7.50)
          );
          List result = invoices.stream(partDescription).sorted().collect(Collectors.toList());
          System.out.println(result);
       }
    }

还有发票类：

    public class Invoice {
       private final String partNumber; 
       private final String partDescription;
       private int quantity;
       private double pricePerItem;

       public Invoice(String partNumber, String partDescription, int quantity,
          double pricePerItem) {
          this.quantity = quantity;
          this.partNumber = partNumber;
          this.partDescription = partDescription;
          this.pricePerItem = pricePerItem;
       } 

Answer 1

找到了我正在寻找的答案。我需要使用：

      List result = invoices.stream().sorted(Comparator.comparing(Invoice::getPartDescription)).collect(Collectors.toList());
      System.out.println(result);