java.util.Collections.rotate()方法的使用及代码示例
本文整理了Java中java.util.Collections.rotate()方法的一些代码示例，展示了Collections.rotate()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Collections.rotate()方法的具体详情如下：
包路径：java.util.Collections
类名称：Collections
方法名：rotate
Collections.rotate介绍
[英]Rotates the elements in list by the distance dist
e.g. for a given list with elements [1, 2, 3, 4, 5, 6, 7, 8, 9, 0], calling rotate(list, 3) or rotate(list, -7) would modify the list to look like this: [8, 9, 0, 1, 2, 3, 4, 5, 6, 7]
[中]按距离距离旋转列表中的元素
e、 g.对于包含元素[1,2,3,4,5,6,7,8,9,0]的给定列表，调用rotate（list，3）或rotate（list，-7）将修改列表，使其如下所示：[8,9,0,1,2,3,4,5,6,7]
代码示例
代码示例来源：origin: igniterealtime/Openfire
private Component getNextComponent() {
Component component;
synchronized (components) {
component = components.get(0);
Collections.rotate(components, 1);
}
return component;
}代码示例来源：origin: stackoverflow.com
Integer[] test = {1,2,3,4,5};
Collections.rotate(Arrays.asList(test), -1);
System.out.println(Arrays.toString(test));
// prints "[2, 3, 4, 5, 1]"代码示例来源：origin: netty/netty
@Override
public void operationComplete(Future<List<InetAddress>> future) throws Exception {
if (future.isSuccess()) {
List<InetAddress> inetAddresses = future.getNow();
if (!inetAddresses.isEmpty()) {
// create a copy to make sure that it's modifiable random access collection
List<InetAddress> result = new ArrayList<InetAddress>(inetAddresses);
// rotate by different distance each time to force round robin distribution
Collections.rotate(result, randomIndex(inetAddresses.size()));
promise.setSuccess(result);
} else {
promise.setSuccess(inetAddresses);
}
} else {
promise.setFailure(future.cause());
}
}
});代码示例来源：origin: redisson/redisson
@Override
public void operationComplete(Future<List<InetAddress>> future) throws Exception {
if (future.isSuccess()) {
List<InetAddress> inetAddresses = future.getNow();
if (!inetAddresses.isEmpty()) {
// create a copy to make sure that it's modifiable random access collection
List<InetAddress> result = new ArrayList<InetAddress>(inetAddresses);
// rotate by different distance each time to force round robin distribution
Collections.rotate(result, randomIndex(inetAddresses.size()));
promise.setSuccess(result);
} else {
promise.setSuccess(inetAddresses);
}
} else {
promise.setFailure(future.cause());
}
}
});代码示例来源：origin: google/google-java-format
if (pos < lastPos) {
List<List<AnnotationTree>> list = new ArrayList<>(dims);
Collections.rotate(list, -(lastAnnotation + 1));
return list;代码示例来源：origin: stackoverflow.com
import java.util.*;
public class BinarySearch {
static int findMinimum(Integer[] arr) {
int low = 0;
int high = arr.length - 1;
while (arr[low] > arr[high]) {
int mid = (low + high) >>> 1;
if (arr[mid] > arr[high]) {
low = mid + 1;
} else {
high = mid;
}
}
return low;
}
public static void main(String[] args) {
Integer[] arr = { 1, 2, 3, 4, 5, 6, 7 };
// must be in sorted order, allowing rotation, and contain no duplicates
for (int i = 0; i < arr.length; i++) {
System.out.print(Arrays.toString(arr));
int minIndex = findMinimum(arr);
System.out.println(" Min is " + arr[minIndex] + " at " + minIndex);
Collections.rotate(Arrays.asList(arr), 1);
}
}
}代码示例来源：origin: wildfly/wildfly
@Override
public void operationComplete(Future<List<InetAddress>> future) throws Exception {
if (future.isSuccess()) {
List<InetAddress> inetAddresses = future.getNow();
if (!inetAddresses.isEmpty()) {
// create a copy to make sure that it's modifiable random access collection
List<InetAddress> result = new ArrayList<InetAddress>(inetAddresses);
// rotate by different distance each time to force round robin distribution
Collections.rotate(result, randomIndex(inetAddresses.size()));
promise.setSuccess(result);
} else {
promise.setSuccess(inetAddresses);
}
} else {
promise.setFailure(future.cause());
}
}
});代码示例来源：origin: primefaces/primefaces
@Override
public void decode(FacesContext context, DataTable table) {
MethodExpression me = table.getDraggableRowsFunction();
if (me != null) {
me.invoke(context.getELContext(), new Object[]{table});
}
else {
Map<String, String> params = context.getExternalContext().getRequestParameterMap();
String clientId = table.getClientId(context);
int fromIndex = Integer.parseInt(params.get(clientId + "_fromIndex"));
int toIndex = Integer.parseInt(params.get(clientId + "_toIndex"));
table.setRowIndex(fromIndex);
Object value = table.getValue();
if (value instanceof List) {
List list = (List) value;
if (toIndex >= fromIndex) {
Collections.rotate(list.subList(fromIndex, toIndex + 1), -1);
}
else {
Collections.rotate(list.subList(toIndex, fromIndex + 1), 1);
}
}
else {
LOGGER.info("Row reordering is only available for list backed datatables, "
+ "use rowReorder ajax behavior with listener for manual handling of model update.");
}
}
}代码示例来源：origin: org.apache.commons/commons-math3
Collections.rotate(child1, lb);
Collections.rotate(child2, lb);代码示例来源：origin: apache/incubator-druid
@Test
public void smokeTest()
{
ThreadLocalRandom r = ThreadLocalRandom.current();
for (int i = 0; i < 1000; i++) {
int numIterators = r.nextInt(1, 11);
List<IntList> lists = new ArrayList<>(numIterators);
for (int j = 0; j < numIterators; j++) {
lists.add(new IntArrayList());
}
for (int j = 0; j < 50; j++) {
lists.get(r.nextInt(numIterators)).add(j);
}
for (int j = 0; j < lists.size() + 1; j++) {
assertAscending(mergeAscending(iteratorsFromLists(lists)));
Collections.rotate(lists, 1);
}
for (int j = 0; j < 10; j++) {
Collections.shuffle(lists);
assertAscending(mergeAscending(iteratorsFromLists(lists)));
}
}
}代码示例来源：origin: soabase/exhibitor
private boolean advanceOrStartRollingConfig(ConfigCollection config, int rollingHostNamesIndex) throws Exception
{
waitingForQuorumAttempts.set(0);
List<String> rollingHostNames = config.getRollingConfigState().getRollingHostNames();
boolean updateConfigResult;
ConfigCollection newCollection = checkNextInstanceState(config, rollingHostNames, rollingHostNamesIndex);
if ( newCollection != null )
{
clearAttempts();
updateConfigResult = internalUpdateConfig(newCollection);
}
else
{
if ( rollingHostNamesIndex < 0 )
{
// this is the start phase - park the bad instance in the back for now
List<String> newRollingHostNames = Lists.newArrayList(rollingHostNames);
Collections.rotate(newRollingHostNames, -1);
ConfigCollection collection = new ConfigCollectionImpl(config.getRootConfig(), config.getRollingConfig(), newRollingHostNames, rollingHostNamesIndex + 1);
clearAttempts();
updateConfigResult = internalUpdateConfig(collection);
}
else
{
updateConfigResult = true;
}
}
return updateConfigResult;
}代码示例来源：origin: apache/incubator-druid
/**
* Check for some possible corner cases, because {@link IntIteratorUtils.MergeIntIterator} is
* implemented using packing ints within longs, that is prone to some overflow or sign bit extension bugs
*/
@Test
public void testOverflow()
{
List<IntList> lists = Lists.newArrayList(
IntLists.singleton(Integer.MIN_VALUE),
IntLists.singleton(Integer.MIN_VALUE),
IntLists.singleton(-1),
IntLists.singleton(0),
IntLists.singleton(MAX_VALUE)
);
for (int i = 0; i < lists.size() + 1; i++) {
assertAscending(mergeAscending(iteratorsFromLists(lists)));
Collections.rotate(lists, 1);
}
Collections.shuffle(lists);
assertAscending(mergeAscending(iteratorsFromLists(lists)));
}代码示例来源：origin: diffplug/spotless
@Test
public void cycleOrder() {
BiConsumer<String, String> testCase = (unorderedStr, canonical) -> {
List<String> unordered = Arrays.asList(unorderedStr.split(","));
for (int i = 0; i < unordered.size(); ++i) {
// try every rotation of the list
Collections.rotate(unordered, 1);
PaddedCell result = CYCLE.create(folder.getRoot(), unordered);
// make sure the canonical result is always the appropriate one
Assert.assertEquals(canonical, result.canonical());
}
};
// alphabetic
testCase.accept("a,b,c", "a");
// length
testCase.accept("a,aa,aaa", "a");
// length > alphabetic
testCase.accept("b,aa,aaa", "b");
}
}代码示例来源：origin: aterai/java-swing-tips
public void next() {
if (running) {
// list.add(list.remove(0));
Collections.rotate(list, 1);
}
}代码示例来源：origin: stackoverflow.com
public static <T> List<T> rotate(List<T> aL, int shift) {
List<T> newValues = new ArrayList<>(aL);
Collections.rotate(newValues, shift);
return newValues;
}代码示例来源：origin: jvelo/mayocat-shop
public static void move(List<?> collection, int indexToMoveFrom, int indexToMoveAt)
{
if (indexToMoveAt >= indexToMoveFrom) {
Collections.rotate(collection.subList(indexToMoveFrom, indexToMoveAt + 1), -1);
} else {
Collections.rotate(collection.subList(indexToMoveAt, indexToMoveFrom + 1), 1);
}
}
}代码示例来源：origin: stackoverflow.com
List<Character> list = Arrays.asList(
'a','b','c','d','e','f','g','h','i','j','k','l'
);
System.out.println(list);
// [a, b, c, d, e, f, g, h, i, j, k, l]
// * * * * *
System.out.println(list.subList(1, 6));
// [b, c, d, e, f]
Collections.rotate(list.subList(1, 6), -2);
System.out.println(list);
// [a, d, e, f, b, c, g, h, i, j, k, l]
// * * * * *代码示例来源：origin: nroduit/Weasis
public void toFront(Graphic graphic) {
List<Graphic> list = graphicManager.getModels();
synchronized (list) {
for (int i = 0; i < list.size(); i++) {
if (list.get(i).equals(graphic)) {
Collections.rotate(list.subList(i, list.size()), -1);
break;
}
}
}
repaint();
}代码示例来源：origin: tinyMediaManager/tinyMediaManager
@Override
public void actionPerformed(ActionEvent e) {
int row = listGenres.getSelectedIndex();
if (row < genres.size() - 1) {
Collections.rotate(genres.subList(row, row + 2), -1);
listGenres.getSelectionModel().setSelectionInterval(row + 1, row + 1);
}
}
}代码示例来源：origin: tinyMediaManager/tinyMediaManager
@Override
public void actionPerformed(ActionEvent e) {
int row = listTags.getSelectedIndex();
if (row < tags.size() - 1) {
Collections.rotate(tags.subList(row, row + 2), -1);
listTags.getSelectionModel().setSelectionInterval(row + 1, row + 1);
}
}
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