Question

当我在CN1 3.5.2上发送Android版本时，似乎无法构建本地运行的代码。任何人都可以告诉我，如果我在代码中做错了什么而不是环境问题吗？

尝试为Android构建时收到的错误消息是＆＃34; ...错误：找不到符号方法compare（int，int）＆＃34;另一个用于Vector类的排序方法。

涉及的行使用Integer.compare（int，int）方法。

这是使用Sort方法的代码：

protected Vector getLearnableListModel(Vector<String> modulesSelected,  Vector<String> categoriesSelected){
        Vector result = MyApplication.moduleSet.getLearnableListModel(modulesSelected, categoriesSelected);
        result.sort(new Comparator() {
            @Override
            public int compare(Object o1, Object o2) {
                LearnableSpec ls1 = (LearnableSpec) o1;
                LearnableSpec ls2 = (LearnableSpec) o2;
                return ls1.compareTo(ls2);
            }
        });
        return result;
    }

这里是我编写的compareTo方法，正在上面调用＆＃34; ls1.compareTo（ls2）;＆＃34;并使用Integer.compare（int，int）方法生成其他编译器错误：

@Override
    public int compareTo(LearnableSpec other) {
        LinkedHashMap modLHM = MyApplication.moduleSet.getAllModules();
        LinkedHashMap catLHM = MyApplication.moduleSet.getAllCategories();

        int i = Integer.compare(indexOfLinkedHashMapKey(modLHM, moduleID), indexOfLinkedHashMapKey(modLHM, other.getModuleID()));
        if (i != 0) return i;

        i = Integer.compare(indexOfLinkedHashMapKey(catLHM,categoryID),indexOfLinkedHashMapKey(catLHM,other.getCategoryID()));
        if (i != 0) return i;

        return name.compareTo(other.getName());
    }

Answer 1

Codename One实现了Java的一个子集，这意味着缺少一些东西。 Painfully Number缺失，并且某些接口未实现，因为它们在Java SE中。

请注意，这样做的好处是，Codename One iOS应用程序可以小到3mb，而不是50mb的最低起点......

对于字符串比较，您可以使用类似CaseInsensitiveOrder的内容进行常规整数比较，例如/** * printableObject extends Printable */ public static boolean print(Object printableObject, String printer_name) throws InterruptedException { InputStream printerTest = new ByteArrayInputStream("".getBytes()); DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE; Doc myDoc = new SimpleDoc(printableObject, DocFlavor.SERVICE_FORMATTED.PRINTABLE, null); Doc docTest = new SimpleDoc(printerTest, flavor, null); HashPrintServiceAttributeSet aset = new HashPrintServiceAttributeSet(); PrintRequestAttributeSet rset = new HashPrintRequestAttributeSet(); PrintService[] services = PrintServiceLookup.lookupPrintServices(null, null); PrinterName printer = new PrinterName(printer_name, null); rset.add(OrientationRequested.PORTRAIT); rset.add(MediaSizeName.INVOICE); aset.add(printer); services = PrintServiceLookup.lookupPrintServices(null, aset); if (!priterIsReady(services[0], 5)) { return false; } if (services != null) { try { DocPrintJob docPrintJobTest = services[0].createPrintJob(); docPrintJobTest.print(docTest, rset); if (!priterIsReady(services[0], 5)) { return false; } DocPrintJob job = services[0].createPrintJob(); job.print(myDoc, rset); Thread.sleep(300); if (priterIsReady(services[0], 5)) { DocPrintJob job2 = services[0].createPrintJob(); job2.print(docTest, rset); return priterIsReady(services[0], 5); } else { return false; } } catch (ArrayIndexOutOfBoundsException ex) { ex.printStackTrace(); } catch (PrintException pe) { pe.printStackTrace(); } } return false; } public static boolean priterIsReady(PrintService printer, int max) throws InterruptedException { int count = 0; while (count < max) { AttributeSet att = printer.getAttributes(); for (Attribute a : att.toArray()) { String attributeName; String attributeValue; attributeName = a.getName(); attributeValue = att.get(a.getClass()).toString(); if (attributeName.equals("queued-job-count")) { if (Integer.valueOf(attributeValue) == 0) { return true; } else { System.err.println(">>> queued-job-count: " + Integer.valueOf(attributeValue)); } } } Thread.sleep(600 + 600 / 5 * count); count = count + 1; } return false; }之类的内容可以很好地工作并满足接口契约。

Build上的CodenameOne错误：＆＃34;错误：找不到符号方法compare（int，int）＆＃34;

1 个答案: