#Java - Code Snippets for '#Iterator'

#Java - Code Snippets for '#Iterator' - 6 code snippet(s) found

Sample 1. Get all Permutations of List Elements using Apache Commons PermutationIterator

List<String> list = new ArrayList();

list.add("Washington");

list.add("Nevada");

list.add("California");



PermutationIterator permIterator = new PermutationIterator((Collection) list);

        

permIterator.forEachRemaining(System.out::print); // prints [Washington, Nevada, California][Washington, California, Nevada][California, Washington, Nevada][California, Nevada, Washington][Nevada, California, Washington][Nevada, Washington, California]

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Sample 2. Code Sample / Example / Snippet of java.text.StringCharacterIterator

    public static String encode(String source) {

        if (source == null) {

            return "$e";

        }

        StringBuffer result = new StringBuffer();

        StringCharacterIterator sci = new StringCharacterIterator(source);

        for (char c = sci.current(); c != CharacterIterator.DONE; c = sci.next()) {

            if (c == '$') {

                result.append("$$");

            }

            else if (c == ',') {

                result.append("$k");

            }

            else if (c == '
') {

                result.append("$n");

            }

            else if (c == '
') {

                result.append("$r");

            }

            else {

                result.append(c);

            }

        }

        return result.toString();

    }

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Sample 3. Usage of Iterator

Iterator iterator = ReportingEmp.iterator();

while (iterator.hasNext()) {

   EmployeeBean eb1 = (EmployeeBean)iterator.next();

   EmployeeFactory empFactory = new EmployeeFactory(eb1.getType()); 

   svEmp = empFactory.getFactoryProduct();

   allocation += svEmp.getAllocation();

}

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Sample 4. Get Length of String having UTF8 Characters

public static int utf8Length(String string) {

   CharacterIterator iter = new StringCharacterIterator(string);

   char ch = iter.first();

   int size = 0;

   while (ch != CharacterIterator.DONE) {

      if ((ch >= 0xD800) && (ch < 0xDC00)) {

         char trail = iter.next();

         if ((trail > 0xDBFF) && (trail < 0xE000)) {

            size += 4;

         } else {

            size += 3;

            iter.previous(); // rewind one

         }

      } else if (ch < 0x80) {

         size++;

      } else if (ch < 0x800) {

         size += 2;

      } else {

         size += 3;

      }

      ch = iter.next();

   }

   return size;

}

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Sample 5. Code Sample / Example / Snippet of java.util.Iterator

    public void validateRangeIterators() {

        SortedRangeSet srs1 = new SortedRangeSet("1-10");

        Iterator i1 = srs1.rangeIterator();

        assert i1.hasNext() : "We should have one Range instance in our iterator.";

        assert ((Range) i1.next()).toRepresentation().equals("1-10");

        assert !i1.hasNext() : "There should be only one instance in our iterator.";

        SortedRangeSet srs2 = new SortedRangeSet("1-5,8,10-15");

        Iterator i2 = srs2.rangeIterator();

        assert i2.hasNext() && i2.next() instanceof Range

            && i2.hasNext() && i2.next() instanceof Range

            && i2.hasNext() && i2.next() instanceof Range

            && !i2.hasNext() : "There should be exactly three Range instances in our iterator.";

        SortedRangeSet srs3 = new SortedRangeSet("");

        assert !srs3.iterator().hasNext() : "Iterator should be empty.";

    }

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Sample 6. Code Sample / Example / Snippet of org.apache.ace.range.RangeIterator

    private void verifyStoreContents(final LogStoreImpl store, final int count, Writer... writers) throws IOException {

        List<Descriptor> descriptors = store.getDescriptors();



        long expectedID = 0;

        for (Descriptor desc : descriptors) {

            SortedRangeSet rangeSet = desc.getRangeSet();

            RangeIterator rangeIter = rangeSet.iterator();



            while (rangeIter.hasNext()) {

                long id = rangeIter.next();



                Event expectedEntry = null;

                for (int i = 0; (expectedEntry == null) && i < writers.length; i++) {

                    expectedEntry = writers[i].m_written.remove(id);

                }

                assertNotNull(expectedEntry, "Event ID #" + id + " never written?!");

                assertEquals(expectedEntry.getID(), expectedID++, "Entry ID mismatch?!");

            }

        }

    }

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