- Java.util Package Classes
- Java.util - Home
- Java.util - ArrayDeque
- Java.util - ArrayList
- Java.util - Arrays
- Java.util - BitSet
- Java.util - Calendar
- Java.util - Collections
- Java.util - Currency
- Java.util - Date
- Java.util - Dictionary
- Java.util - EnumMap
- Java.util - EnumSet
- Java.util - Formatter
- Java.util - GregorianCalendar
- Java.util - HashMap
- Java.util - HashSet
- Java.util - Hashtable
- Java.util - IdentityHashMap
- Java.util - LinkedHashMap
- Java.util - LinkedHashSet
- Java.util - LinkedList
- Java.util - ListResourceBundle
- Java.util - Locale
- Java.util - Observable
- Java.util - PriorityQueue
- Java.util - Properties
- Java.util - PropertyPermission
- Java.util - PropertyResourceBundle
- Java.util - Random
- Java.util - ResourceBundle
- Java.util - ResourceBundle.Control
- Java.util - Scanner
- Java.util - ServiceLoader
- Java.util - SimpleTimeZone
- Java.util - Stack
- Java.util - StringTokenizer
- Java.util - Timer
- Java.util - TimerTask
- Java.util - TimeZone
- Java.util - TreeMap
- Java.util - TreeSet
- Java.util - UUID
- Java.util - Vector
- Java.util - WeakHashMap
- Java.util Package Extras
- Java.util - Interfaces
- Java.util - Exceptions
- Java.util - Enumerations
- Java.util Useful Resources
- Java.util - Useful Resources
- Java.util - Discussion
Java Collections synchronizedCollection() Method
Description
The synchronizedCollection(Collection<T>) method is used get a synchronized (thread-safe) collection backed by the specified collection.
Declaration
Following is the declaration for java.util.Collections.synchronizedCollection() method.
public static <T> Collection<T> synchronizedCollection(Collection<T> c)
Parameters
c − The collection to be "wrapped" in a synchronized collection.
Return Value
The method call returns a synchronized view of the specified collection.
Exception
NA
Getting Synchronized Collection From a Unsynchronized List of Integer Example
The following example shows the usage of Java Collection synchronizedCollection(Collection) method. We've created a List object with some integers. Using synchronizedCollection(Collection) method, we've retrieved the synchronized version of list and printed the list.
package com.tutorialspoint; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Collection; public class CollectionsDemo { public static void main(String[] args) { List<Integer> list = new ArrayList<>(Arrays.asList(1,2,3,4,5)); // synchronized version of list Collection<Integer> c = Collections.synchronizedCollection(list); System.out.println("Synchronized collection: "+ c); } }
Output
Let us compile and run the above program, this will produce the following result −
Synchronized collection: [1, 2, 3, 4, 5]
Getting Synchronized Collection From a Unsynchronized List of String Example
The following example shows the usage of Java Collection synchronizedCollection(Collection) method. We've created a List object with some strings. Using synchronizedCollection(Collection) method, we've retrieved the synchronized version of list and printed the list.
package com.tutorialspoint; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Collection; public class CollectionsDemo { public static void main(String[] args) { List<String> list = new ArrayList<>(Arrays.asList("Welcome","to","Tutorialspoint")); // synchronized version of list Collection<String> c = Collections.synchronizedCollection(list); System.out.println("Synchronized collection: "+ c); } }
Output
Let us compile and run the above program, this will produce the following result −
Synchronized collection: [Welcome, to, Tutorialspoint]
Getting Synchronized Collection From a Unsynchronized List of Object Example
The following example shows the usage of Java Collection synchronizedCollection(Collection) method. We've created a List object with some Student objects. Using synchronizedCollection(Collection) method, we've retrieved the synchronized version of list and printed the list.
package com.tutorialspoint; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Collection; public class CollectionsDemo { public static void main(String[] args) { List<Student> list = new ArrayList<>(Arrays.asList(new Student(1, "Julie"), new Student(2, "Robert"), new Student(3, "Adam"))); // synchronized version of list Collection<Student> c = Collections.synchronizedCollection(list); System.out.println("Synchronized collection: "+ c); } } class Student { int rollNo; String name; Student(int rollNo, String name){ this.rollNo = rollNo; this.name = name; } @Override public String toString() { return "[ " + this.rollNo + ", " + this.name + " ]"; } }
Output
Let us compile and run the above program, this will produce the following result −
Synchronized collection: [[ 1, Julie ], [ 2, Robert ], [ 3, Adam ]]
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