Uses of Class
java.lang.Object

Packages that use Object

Package	Description
java.io
java.lang
java.lang.annotation
java.lang.invoke
java.lang.ref
java.lang.reflect
java.net
java.nio.charset
java.text
java.time
java.time.format
java.util
java.util.concurrent
java.util.concurrent.atomic
java.util.stream

Uses of Object in java.io

Subclasses of Object in java.io

Modifier and Type	Class and Description
class	ByteArrayInputStream
class	ByteArrayOutputStream
class	DataInputStream
class	DataOutputStream
class	EOFException
class	FileNotFoundException
class	InputStream
class	InputStreamReader
class	InterruptedIOException
class	IOException
class	OutputStream
class	OutputStreamWriter
class	PrintStream
class	Reader
class	StringReader
class	StringWriter
class	UnsupportedEncodingException
class	UTFDataFormatException
class	Writer

Fields in java.io declared as Object

Modifier and Type	Field and Description
protected Object	Writer.lock
protected Object	Reader.lock

Methods in java.io with parameters of type Object

Modifier and Type	Method and Description
void	PrintStream.print(Object obj)
void	PrintStream.println(Object x)

Constructors in java.io with parameters of type Object

Constructor and Description
Reader(Object lock)
Writer(Object lock)

Uses of Object in java.lang

Subclasses of Object in java.lang

Modifier and Type	Class and Description
class	AbstractMethodError
class	ArithmeticException
class	ArrayIndexOutOfBoundsException
class	ArrayStoreException
class	AssertionError
class	Boolean
class	Byte
class	Character
class	Class<T>
class	ClassCastException
class	ClassLoader
class	ClassNotFoundException
class	CloneNotSupportedException
class	Double
class	Enum<E extends Enum<E>>
class	Error
class	Exception
class	Float
class	IllegalAccessException
class	IllegalArgumentException
class	IllegalMonitorStateException
class	IllegalStateException
class	IllegalThreadStateException
class	IncompatibleClassChangeError
class	IndexOutOfBoundsException
class	InstantiationException
class	Integer
class	InterruptedException
class	LinkageError
class	Long
class	Math
class	NegativeArraySizeException
class	NoClassDefFoundError
class	NoSuchFieldError
class	NullPointerException
class	Number
class	NumberFormatException
class	OutOfMemoryError
class	Record
class	Runtime
class	RuntimeException
class	SecurityException
class	Short
class	StackTraceElement
class	String
class	StringBuffer
class	StringBuilder
class	StringIndexOutOfBoundsException
class	System
class	Thread
class	ThreadLocal<T>
class	Throwable
class	UnsupportedOperationException
class	VirtualMachineError
class	Void

Methods in java.lang that return Object

Modifier and Type	Method and Description
Object	Class.cast(Object object)
protected Object	Object.clone()
protected Object	Enum.clone()
protected static <T> T[]	Enum.getEnumValues(Class<T> class_)
Object	Class.newInstance()

Methods in java.lang with parameters of type Object

Modifier and Type	Method and Description
StringBuilder	StringBuilder.append(Object obj)
StringBuffer	StringBuffer.append(Object obj)
static void	System.arraycopy(Object src, int srcOffset, Object dst, int dstOffset, int length)
Object	Class.cast(Object object)
abstract boolean	Record.equals(Object obj)
boolean	String.equals(Object anObject)
boolean	Short.equals(Object obj)
boolean	Object.equals(Object obj)
boolean	Long.equals(Object obj)
boolean	Integer.equals(Object obj)
boolean	Float.equals(Object obj)
boolean	Enum.equals(Object other)
boolean	Double.equals(Object obj)
boolean	Character.equals(Object obj)
boolean	Byte.equals(Object obj)
boolean	Boolean.equals(Object obj)
static String	String.format(String format, Object... args)
static int	System.identityHashCode(Object x)
StringBuilder	StringBuilder.insert(int offset, Object obj)
StringBuffer	StringBuffer.insert(int offset, Object obj)
boolean	Class.isInstance(Object obj)
protected static void	Enum.setEnumValues(Object[] values, Class c)
static String	String.valueOf(Object obj)

Constructors in java.lang with parameters of type Object

Constructor and Description
AssertionError(Object detailMessage)

Uses of Object in java.lang.annotation

Subclasses of Object in java.lang.annotation

Modifier and Type	Class and Description
class	AnnotationFormatError
class	IncompleteAnnotationException

Methods in java.lang.annotation with parameters of type Object

Modifier and Type	Method and Description
boolean	Annotation.equals(Object obj)

Uses of Object in java.lang.invoke

Subclasses of Object in java.lang.invoke

Modifier and Type	Class and Description
class	CallSite
class	LambdaMetafactory
class	MethodHandle
class	MethodHandles
static class	MethodHandles.Lookup
class	MethodType
class	StringConcatFactory

Methods in java.lang.invoke that return Object

Modifier and Type	Method and Description
Object	MethodHandle.invoke(Object... a)
Object	MethodHandle.invokeExact(Object... a)
Object	MethodHandle.invokeWithArguments(List<?> a)
Object	MethodHandle.invokeWithArguments(Object... a)

Methods in java.lang.invoke with parameters of type Object

Modifier and Type	Method and Description
static CallSite	LambdaMetafactory.altMetafactory(MethodHandles.Lookup a, String b, MethodType c, Object... d)
MethodHandle	MethodHandles.Lookup.bind(Object a, String b, MethodType c)
MethodHandle	MethodHandle.bindTo(Object a)
static MethodHandle	MethodHandles.constant(Class<?> a, Object b)
static MethodHandle	MethodHandles.insertArguments(MethodHandle a, int b, Object... c)
Object	MethodHandle.invoke(Object... a)
Object	MethodHandle.invokeExact(Object... a)
Object	MethodHandle.invokeWithArguments(Object... a)
static CallSite	StringConcatFactory.makeConcatWithConstants(MethodHandles.Lookup lookup, String name, MethodType concatType, String recipe, Object... constants)
MethodHandle	MethodHandles.Lookup.unreflect(Object a)
MethodHandle	MethodHandles.Lookup.unreflectConstructor(Object a)
MethodHandle	MethodHandles.Lookup.unreflectGetter(Object a)
MethodHandle	MethodHandles.Lookup.unreflectSetter(Object a)
MethodHandle	MethodHandles.Lookup.unreflectSpecial(Object a, Class<?> b)

Uses of Object in java.lang.ref

Subclasses of Object in java.lang.ref

Modifier and Type	Class and Description
class	Reference
class	WeakReference

Methods in java.lang.ref that return Object

Modifier and Type	Method and Description
Object	Reference.get()

Constructors in java.lang.ref with parameters of type Object

Constructor and Description
WeakReference(Object ref)

Uses of Object in java.lang.reflect

Subclasses of Object in java.lang.reflect

Modifier and Type	Class and Description
class	Array
class	Constructor
class	Method

Methods in java.lang.reflect that return Object

Modifier and Type	Method and Description
static Object	Array.newInstance(Class<?> componentType, int length)
static Object	Array.newInstance(Class<?> componentType, int[] dimensions)

Uses of Object in java.net

Subclasses of Object in java.net

Modifier and Type	Class and Description
class	URI
class	URISyntaxException

Methods in java.net with parameters of type Object

Modifier and Type	Method and Description
boolean	URI.equals(Object that)

Uses of Object in java.nio.charset

Subclasses of Object in java.nio.charset

Modifier and Type	Class and Description
class	Charset
class	StandardCharsets

Uses of Object in java.text

Subclasses of Object in java.text

Modifier and Type	Class and Description
class	DateFormat
class	DateFormatSymbols
class	Format
class	ParseException
class	SimpleDateFormat

Methods in java.text that return Object

Modifier and Type	Method and Description
Object	SimpleDateFormat.clone()
Object	DateFormatSymbols.clone()
Object	DateFormat.clone()
abstract Object	Format.parseObject(String source)
Object	DateFormat.parseObject(String source)

Methods in java.text with parameters of type Object

Modifier and Type	Method and Description
boolean	DateFormat.equals(Object obj)
abstract String	Format.format(Object source)
String	DateFormat.format(Object obj)

Uses of Object in java.time

Subclasses of Object in java.time

Modifier and Type	Class and Description
class	Clock
class	Duration
class	Instant
class	LocalDate
class	LocalDateTime
class	LocalTime
class	OffsetDateTime
class	Period
class	ZonedDateTime
class	ZoneId
class	ZoneOffset

Methods in java.time with parameters of type Object

Modifier and Type	Method and Description
boolean	ZonedDateTime.equals(Object obj)
boolean	ZoneId.equals(Object obj)
boolean	OffsetDateTime.equals(Object obj)
boolean	LocalTime.equals(Object obj)
boolean	LocalDateTime.equals(Object obj)
boolean	LocalDate.equals(Object obj)
boolean	Instant.equals(Object obj)
boolean	Duration.equals(Object obj)

Uses of Object in java.time.format

Subclasses of Object in java.time.format

Modifier and Type	Class and Description
class	DateTimeFormatter
class	DateTimeParseException

Uses of Object in java.util

Subclasses of Object in java.util

Modifier and Type	Class and Description
class	AbstractCollection<E>
class	AbstractList<E>
class	AbstractMap<K,V>
static class	AbstractMap.SimpleEntry<K,V>
static class	AbstractMap.SimpleImmutableEntry<K,V>
class	AbstractQueue<E>
class	AbstractSequentialList<E>
class	AbstractSet<E>
class	ArrayDeque<E>
class	ArrayList<E>
class	Arrays
class	BitSet
class	Calendar
class	Collections
class	ConcurrentModificationException
class	Date
class	Dictionary<K,V>
class	EmptyStackException
class	EventListenerProxy
class	HashMap<K,V>
class	HashSet<E>
class	Hashtable<K,V>
class	IdentityHashMap<K,V>
class	LinkedHashMap<K,V>
class	LinkedHashSet<E>
class	LinkedList<E>
class	Locale
class	NoSuchElementException
class	Objects
class	Observable
class	PriorityQueue<E>
class	Random
class	Stack<E>
class	StringTokenizer
class	Timer
class	TimerTask
class	TimeZone
class	TreeMap<K,V>
class	TreeSet<E>
class	Vector<E>

Fields in java.util declared as Object

Modifier and Type	Field and Description
protected Object[]	Vector.elementData

Methods in java.util with type parameters of type Object

Modifier and Type	Method and Description
static <T extends Object & Comparable<? super T>> T	Collections.max(Collection<? extends T> collection)
static <T extends Object & Comparable<? super T>> T	Collections.min(Collection<? extends T> collection)

Methods in java.util that return Object

Modifier and Type	Method and Description
static <T> T[]	Arrays.copyOf(T[] original, int newLength)
static <T> T[]	Arrays.copyOf(T[] original, int newLength, Class<? extends T[]> newType)
static <T> T[]	Arrays.copyOfRange(T[] original, int from, int to)
static <T,U> T[]	Arrays.copyOfRange(U[] original, int from, int to, Class<? extends T[]> newType)
Object	StringTokenizer.nextElement()
Object[]	Vector.toArray()
Object[]	Set.toArray()
Object[]	PriorityQueue.toArray()
Object[]	List.toArray()
Object[]	LinkedList.toArray()
Object[]	Collection.toArray()
Object[]	ArrayList.toArray()
Object[]	AbstractList.toArray()
Object[]	AbstractCollection.toArray()
<T> T[]	Vector.toArray(T[] contents)
<T> T[]	Set.toArray(T[] array)
<T> T[]	PriorityQueue.toArray(T[] array)
<T> T[]	List.toArray(T[] array)
<T> T[]	LinkedList.toArray(T[] contents)
<T> T[]	Collection.toArray(T[] array)
<T> T[]	ArrayList.toArray(T[] contents)
<T> T[]	AbstractList.toArray(T[] contents)
<T> T[]	AbstractCollection.toArray(T[] contents)

Methods in java.util with parameters of type Object

Modifier and Type	Method and Description
static <T> boolean	Collections.addAll(Collection<? super T> c, T... a)
boolean	Calendar.after(Object when)
static <T> List<T>	Arrays.asList(T... array)
boolean	Calendar.before(Object when)
static int	Arrays.binarySearch(Object[] array, int startIndex, int endIndex, Object object)
static int	Arrays.binarySearch(Object[] array, int startIndex, int endIndex, Object object)
static int	Arrays.binarySearch(Object[] array, Object object)
static int	Arrays.binarySearch(Object[] array, Object object)
static <T> int	Arrays.binarySearch(T[] array, int startIndex, int endIndex, T object, Comparator<? super T> comparator)
static <T> int	Arrays.binarySearch(T[] array, T object, Comparator<? super T> comparator)
boolean	Vector.contains(Object object)
boolean	TreeSet.contains(Object object)
boolean	Set.contains(Object object)
boolean	PriorityQueue.contains(Object object)
boolean	List.contains(Object object)
boolean	LinkedList.contains(Object object)
boolean	Hashtable.contains(Object value)
boolean	HashSet.contains(Object object)
boolean	Collection.contains(Object object)
boolean	ArrayList.contains(Object object)
boolean	ArrayDeque.contains(Object obj)
boolean	AbstractCollection.contains(Object object)
boolean	TreeMap.containsKey(Object key)
boolean	Map.containsKey(Object key)
boolean	IdentityHashMap.containsKey(Object key)
boolean	Hashtable.containsKey(Object key)
boolean	HashMap.containsKey(Object key)
boolean	AbstractMap.containsKey(Object key)
boolean	TreeMap.containsValue(Object value)
boolean	Map.containsValue(Object value)
boolean	LinkedHashMap.containsValue(Object value)
boolean	IdentityHashMap.containsValue(Object value)
boolean	Hashtable.containsValue(Object value)
boolean	HashMap.containsValue(Object value)
boolean	AbstractMap.containsValue(Object value)
void	Vector.copyInto(Object[] elements)
static <T> T[]	Arrays.copyOf(T[] original, int newLength)
static <T> T[]	Arrays.copyOf(T[] original, int newLength, Class<? extends T[]> newType)
static <T> T[]	Arrays.copyOfRange(T[] original, int from, int to)
static <T,U> T[]	Arrays.copyOfRange(U[] original, int from, int to, Class<? extends T[]> newType)
static boolean	Arrays.deepEquals(Object[] array1, Object[] array2)
static boolean	Arrays.deepEquals(Object[] array1, Object[] array2)
static boolean	Objects.deepEquals(Object a, Object b)
static int	Arrays.deepHashCode(Object[] array)
static String	Arrays.deepToString(Object[] array)
boolean	Vector.equals(Object object)
boolean	Set.equals(Object object)
boolean	Map.equals(Object object)
boolean	Map.Entry.equals(Object object)
boolean	List.equals(Object object)
boolean	IdentityHashMap.equals(Object object)
boolean	Hashtable.equals(Object object)
boolean	Date.equals(Object obj)
boolean	Comparator.equals(Object object)
boolean	Collection.equals(Object object)
boolean	Calendar.equals(Object obj)
boolean	BitSet.equals(Object obj)
boolean	AbstractSet.equals(Object object)
boolean	AbstractMap.equals(Object object)
boolean	AbstractMap.SimpleImmutableEntry.equals(Object object)
boolean	AbstractMap.SimpleEntry.equals(Object object)
boolean	AbstractList.equals(Object object)
static boolean	Arrays.equals(Object[] array1, Object[] array2)
static boolean	Arrays.equals(Object[] array1, Object[] array2)
static boolean	Objects.equals(Object a, Object b)
static void	Arrays.fill(Object[] array, int start, int end, Object value)
static void	Arrays.fill(Object[] array, int start, int end, Object value)
static void	Arrays.fill(Object[] array, Object value)
static void	Arrays.fill(Object[] array, Object value)
static int	Collections.frequency(Collection<?> c, Object o)
V	TreeMap.get(Object key)
V	Map.get(Object key)
V	LinkedHashMap.get(Object key)
V	IdentityHashMap.get(Object key)
V	Hashtable.get(Object key)
V	HashMap.get(Object key)
abstract V	Dictionary.get(Object key)
V	AbstractMap.get(Object key)
default V	Map.getOrDefault(Object key, V defaultValue)
static int	Objects.hash(Object... values)
static int	Objects.hashCode(Object o)
static int	Arrays.hashCode(Object[] array)
int	Vector.indexOf(Object object)
int	List.indexOf(Object object)
int	LinkedList.indexOf(Object object)
int	ArrayList.indexOf(Object object)
int	AbstractList.indexOf(Object object)
int	Vector.indexOf(Object object, int location)
int	Vector.lastIndexOf(Object object)
int	List.lastIndexOf(Object object)
int	LinkedList.lastIndexOf(Object object)
int	ArrayList.lastIndexOf(Object object)
int	AbstractList.lastIndexOf(Object object)
int	Vector.lastIndexOf(Object object, int location)
static boolean	Objects.nonNull(Object obj)
void	Observable.notifyObservers(Object data)
boolean	Vector.remove(Object object)
boolean	TreeSet.remove(Object object)
V	TreeMap.remove(Object key)
boolean	Set.remove(Object object)
boolean	PriorityQueue.remove(Object o)
V	Map.remove(Object key)
boolean	List.remove(Object object)
boolean	LinkedList.remove(Object object)
V	LinkedHashMap.remove(Object key)
V	IdentityHashMap.remove(Object key)
V	Hashtable.remove(Object key)
boolean	HashSet.remove(Object object)
V	HashMap.remove(Object key)
abstract V	Dictionary.remove(Object key)
boolean	Collection.remove(Object object)
boolean	ArrayList.remove(Object object)
boolean	ArrayDeque.remove(Object obj)
V	AbstractMap.remove(Object key)
boolean	AbstractCollection.remove(Object object)
default boolean	Map.remove(Object key, Object value)
boolean	Vector.removeElement(Object object)
boolean	LinkedList.removeFirstOccurrence(Object o)
boolean	Deque.removeFirstOccurrence(Object o)
boolean	ArrayDeque.removeFirstOccurrence(Object obj)
boolean	LinkedList.removeLastOccurrence(Object o)
boolean	Deque.removeLastOccurrence(Object o)
boolean	ArrayDeque.removeLastOccurrence(Object obj)
int	Stack.search(Object o)
static void	Arrays.sort(Object[] array)
static void	Arrays.sort(Object[] array, int start, int end)
static <T> void	Arrays.sort(T[] array, Comparator<? super T> comparator)
static <T> void	Arrays.sort(T[] array, int start, int end, Comparator<? super T> comparator)
<T> T[]	Vector.toArray(T[] contents)
<T> T[]	Set.toArray(T[] array)
<T> T[]	PriorityQueue.toArray(T[] array)
<T> T[]	List.toArray(T[] array)
<T> T[]	LinkedList.toArray(T[] contents)
<T> T[]	Collection.toArray(T[] array)
<T> T[]	ArrayList.toArray(T[] contents)
<T> T[]	AbstractList.toArray(T[] contents)
<T> T[]	AbstractCollection.toArray(T[] contents)
static String	Objects.toString(Object o)
static String	Arrays.toString(Object[] array)
static String	Objects.toString(Object o, String nullDefault)
void	Observer.update(Observable observable, Object data)

Uses of Object in java.util.concurrent

Subclasses of Object in java.util.concurrent

Modifier and Type	Class and Description
class	ThreadLocalRandom

Uses of Object in java.util.concurrent.atomic

Subclasses of Object in java.util.concurrent.atomic

Modifier and Type	Class and Description
class	AtomicBoolean
class	AtomicInteger
class	AtomicLong
class	AtomicReference<V>

Uses of Object in java.util.stream

Subclasses of Object in java.util.stream

Modifier and Type	Class and Description
class	Collectors

Methods in java.util.stream that return Object

Modifier and Type	Method and Description
Object[]	Stream.toArray()

Methods in java.util.stream with parameters of type Object

Modifier and Type	Method and Description
static <T> Stream<T>	Stream.of(T... values)