- String charAt()
- String compareTo()
- String concat()
- String contains()
- String endsWith()
- String equals()
- equalsIgnoreCase()
- String format()
- String getBytes()
- String getChars()
- String indexOf()
- String intern()
- String isEmpty()
- String join()
- String lastIndexOf()
- String length()
- String replace()
- String replaceAll()
- String split()
- String startsWith()
- String valueOf()
- String substring()
- String toCharArray()
- String toLowerCase()
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- String trim()
- Math.abs()
- Math.max()
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- Math.round()
- Math.sqrt()
- Math.cbrt()
- Math.pow()
- Math.signum()
- Math.ceil()
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- Math.floor()
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- Math.random()
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- Math.hypot()
- Math.ulp()
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- Math.negateExact()
- Math.toIntExact()
- Math.log()
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- Math.exp()
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- start()
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- Collection add()
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- Collection equals()
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- Collection iterator()
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- Collection removeAll()
- Collection removeIf()
- Collection retainAll()
- Collection size()
- Collection spliterator()
- Collection toArray()
- Vector add()
- Vector addAll()
- Vector addElement()
- Vector capacity()
- Vector clear()
- Vector clone()
- Vector containsAll()
- Vector contains()
- Vector copyInto()
- Vector elements()
- Vector ensureCapacity()
- Vector equals()
- Vector firstElement()
- Vector forEach()
- Vector hashCode()
- Vector elementAt()
- Vector get()
- Vector indexOf()
- Vector insertElementAt()
- Vector isEmpty()
- Vector iterator()
- Vector lastElement()
- Vector lastIndexOf()
- Vector removeAllElements()
- Vector removeAll()
- Vector removeElementAt()
- Vector removeElement()
- Vector remove()
- Vector replaceAll()
- Vector retainAll()
- Vector removeRange()
- Vector setElementAt()
- Vector set()
- Vector setSize()
- Vector size()
- Vector sort()
- Vector spliterator()
- Vector subList()
- Vector toString()
- Vector trimToSize()
- Vector listIterator()
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- Socket Class
- Socket bind()
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- Java Integer Class
- Integer bitCount()
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- Integer compare()
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- Integer reverseBytes()
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- Integer rotateLeft()
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- Integer shortValue()
- Integer signum()
- Integer sum()
- Integer toBinaryString()
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- Integer toUnsignedLong()
- Java Integer toUnsignedString() Method
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- Java IdentityHashMap values() method
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- Java ArrayBlockingQueue drainTo() Method
- Java ArrayBlockingQueue Class
- Java ArrayBlockingQueue add() Method
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- Java ArrayBlockingQueue poll() Method
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- Java Spliterator
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- Java Spliterator getComparator() Method
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- Java Spliterator hasCharacteristics() Method
- Java Spliterator tryAdvance() Method
- Java Spliterator trySplit() Method
- Java BitSet flip() method
- Java BitSet xor() method
- Java BitSet valueOf() method
- Java BitSet toString() method
- Java BitSet toLongArray() method
- Java BitSet toByteArray() method
- Java BitSet stream() method
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- Java BitSet set() method
- Java BitSet previousSetBit() method
- Java BitSet previousClearBit() method
- Java BitSet or() method
- Java BitSet nextSetBit() method
- Java BitSet nextClearBit() method
- Java BitSet length() method
- Java BitSet isEmpty() method
- Java BitSet intersects() method
- Java BitSet hashCode() method
- Java BitSet get() method
- Java BitSet equals() method
- Java BitSet clone() method
- Java BitSet cardinality() method
- Java BitSet clear() method
- Java BitSet andNot() method
- Java BitSet and() method
- Java Instant query() method
- Java Instant compareTo() method
- Java Instant plusSeconds() method
- Java Instant plusNanos() method
- Java Instant plusMillis() method
- Java Instant atOffset() method
- Java Instant ofEpochSecond() method
- Java Instant ofEpochMilli() method
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- Java Instant minusSeconds() method
- Java Instant minusNanos() method
- Java Instant minusMillis() method
- Java Instant minus() method
- Java Instant isSupported() method
- Java Instant isBefore() method
- Java Instant isAfter() method
- Java Instant hashCode() method
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- Java Instant getLong() method
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- Java AtomicInteger
- addAndGet(int delta)
- compareAndSet(int expect, int update)
- decrementAndGet()
- doubleValue()
- floatValue()
- get()
- getAndAdd()
- getAndDecrement()
- getAndSet()
- incrementAndGet()
- getAndIncrement()
- intValue()
- lazySet(int newValue)
- longValue()
- set(int newValue)
- toString()
- weakCompareAndSet(int expect,int newValue)
- Big Integer Class
- abs()
- add()
- and()
- andNot()
- bitCount()
- bitLength()
- clearBit()
- compareTo()
- divide()
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- doubleValue()
- equals()
- flipBit()
- floatValue()
- gcd()
- getLowestSetBit()
- hashCode()
- intValue()
- isProbablePrime()
- longValue()
- max()
- min()
- mod()
- modInverse()
- modPow()
- negate()
- nextProbablePrime()
- not()
- or()
- pow()
- probablePrime()
- setBit()
- shiftLeft()
- shiftRight()
- signum()
- subtract()
- testbit()
- toByteArray()
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- xor()
- Java BigInteger sqrt() method
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- isArray()
- isInstance()
- isInterface()
- isPrimitive()
- isSynthetic()
- Java Collections class
- addAll()
- asLifoQueue()
- binarySearch()
- checkedCollection()
- checkedList()
- checkedMap()
- checkedNavigableMap()
- checkedNavigableSet()
- checkedQueue()
- checkedSet()
- checkedSortedMap()
- checkedSortedSet()
- copy()
- disjoint()
- emptyEnumeration()
- emptyIterator()
- emptyList()
- emptyListIterator()
- emptyMap()
- emptyNavigableMap()
- emptyNavigableSet()
- emptySet()
- emptySortedMap()
- emptySortedSet()
- enumeration()
- fill()
- frequency()
- indexOfSubList()
- lastIndexOfSubList()
- list()
- max()
- min()
- nCopies()
- newSetFromMap()
- replaceAll()
- reverse()
- reverseOrder()
- rotate()
- shuffle()
- singleton()
- singletonList()
- singletonMap()
- Java Collections sort() Method
- swap()
- synchronizedCollection()
- synchronizedList()
- synchronizedMap()
- synchronizedNavigableMap()
- synchronizedNavigableSet()
- synchronizedSet()
- synchronizedSortedMap()
- synchronizedSortedSet()
- unmodifiableCollection()
- unmodifiableList()
- unmodifiableMap()
- unmodifiableNavigableMap()
- unmodifiableNavigableSet()
- unmodifiableSet()
- unmodifiableSortedMap()
- unmodifiableSortedSet()
- Difference between Array and ArrayList
- When to use ArrayList and LinkedList in Java
- Difference between ArrayList and Vector
- How to Compare Two ArrayList in Java
- How to reverse ArrayList in Java
- When to use ArrayList and LinkedList in Java
- How to make ArrayList Read Only
- Difference between length of array and size() of ArrayList in Java
- How to Synchronize ArrayList in Java
- How to convert ArrayList to Array and Array to ArrayList in java
- Array vs ArrayList in Java
- How to Sort Java ArrayList in Descending Order
- How to remove duplicates from ArrayList in Java
Java Collections copy() Method21 Mar 2025 | 2 min read The copy() method of Java Collections class copies all of the elements from one list into another list. In this method, the size of the destination list must be greater than or equal to the size of the source list. SyntaxFollowing is the declaration of copy() method: Parameter
ReturnsThe copy() method does not return anything. ExceptionsThe copy() method throws the following exceptions- IndexOutOfBoundsException- It throws an exception if the destination list is too small to store the entire source List. UnsupportedOperationException- It throws this type of exception if the destination list's list-iterator does not support the set operation. Compatibility VersionJava 1.4 and above Example 1Output: Elements of source list: [Java Tutorial, is best on, TpointTech] Elements of destination list: [Java Tutorial, is best on, TpointTech] Example 2Output: 1 2 3 4 9 10 Example 3Output: Exception in thread "main" java.lang.IndexOutOfBoundsException: Source does not fit in dest at java.base/java.util.Collections.copy(Collections.java:558) at myPackage.CollectionsCopyExample3.main(CollectionsCopyExample3.java:8) Example 4Output: Elements of Source List: [50, 10, 20] Elements of Destination List: [one, two, three, four, five] Elements of Destination List after copying Source List: [50, 10, 20, four, five] Next TopicJava Collections Class |
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