- 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 emptySortedSet() Method
Description
The Java Collections emptySortedSet() method is used to get the empty sorted set (immutable). This set is serializable.
Declaration
Following is the declaration for java.util.Collections.emptySortedSet() method.
public static final <T> SortedSet<T> emptySortedSet()
Parameters
NA
Return Value
NA
Exception
NA
Getting Empty SortedSet of Integers Example
The following example shows the usage of Java Collection emptySortedSet() method to get an empty sorted set of Integers. We've created an empty sorted set using emptySortedSet() method and then tried adding few elements to it which results in exception.
package com.tutorialspoint; import java.util.Collections; import java.util.SortedSet; public class CollectionsDemo { public static void main(String args[]) { // create an empty sorted set SortedSet<Integer> emptySortedSet = Collections.emptySortedSet(); System.out.println("Created empty immutable sorted set: "+emptySortedSet); // try to add elements emptySortedSet.add(1); emptySortedSet.add(2); } }
Output
Let us compile and run the above program, this will produce the following result.Exception will be thrown as the list is immutable.
Created empty immutable sorted set: [] Exception in thread "main" java.lang.UnsupportedOperationException at java.base/java.util.Collections$UnmodifiableCollection.add(Collections.java:1060) at com.tutorialspoint.CollectionsDemo.main(CollectionsDemo.java:15)
Getting Empty SortedSet of Strings Example
The following example shows the usage of Java Collection emptySortedSet() method to get an empty sorted set of Strings. We've created an empty sorted set using emptySortedSet() method and then tried adding few elements to it which results in exception.
package com.tutorialspoint; import java.util.Collections; import java.util.SortedSet; public class CollectionsDemo { public static void main(String args[]) { // create an empty sorted set SortedSet<String> emptySortedSet = Collections.emptySortedSet(); System.out.println("Created empty immutable sorted set: "+emptySortedSet); // try to add elements emptySortedSet.add("A"); emptySortedSet.add("B"); } }
Output
Let us compile and run the above program, this will produce the following result.Exception will be thrown as the list is immutable.
Created empty immutable sorted set: [] Exception in thread "main" java.lang.UnsupportedOperationException at java.base/java.util.Collections$UnmodifiableCollection.add(Collections.java:1060) at com.tutorialspoint.CollectionsDemo.main(CollectionsDemo.java:15)
Getting Empty SortedSet of Object Example
The following example shows the usage of Java Collection emptySortedSet() method to get an empty sorted set of Student objects. We've created an empty sorted set using emptySortedSet() method and then tried adding few elements to it which results in exception.
package com.tutorialspoint; import java.util.Collections; import java.util.SortedSet; public class CollectionsDemo { public static void main(String args[]) { // create an empty sorted set SortedSet<Student> emptySortedSet = Collections.emptySortedSet(); System.out.println("Created empty immutable sorted set: "+emptySortedSet); // try to add elements emptySortedSet.add(new Student(1, "Julie")); emptySortedSet.add(new Student(2, "Robert")); } } 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.Exception will be thrown as the list is immutable.
Created empty immutable sorted set: [] Exception in thread "main" java.lang.UnsupportedOperationException at java.base/java.util.Collections$UnmodifiableCollection.add(Collections.java:1060) at com.tutorialspoint.CollectionsDemo.main(CollectionsDemo.java:15)
To Continue Learning Please Login
Login with Google