The unmodifiableSortedSet() method of Java Collections is available in TreeSet. A Tree Set is a data structure that can store elements in order.
Syntax:
SortedSet<datatype> data = new TreeSet<String>();
where,
- datatype specifies the type of elements
- data is the input data.
unmodifiableSortedSet() Method
The unmodifiableSortedSet() method of the Java Collections class is used to get an unmodifiable view of the specified sorted set.
Syntax:
public static <T> SortedSet<T> unmodifiableSortedSet(SortedSet<T> data)
where data is the sorted set that is returned in an unmodifiable view.
Return type: This method returns an unmodifiable view of the specified Sorted Set.
Example 1:
Demonstration before and after modification
Java
import java.util.*;
public class GFG1 {
// main method
public static void main(String[] args)
{
// create a set named data
SortedSet<String> data = new TreeSet<String>();
// Add values in the data
data.add( "java" );
data.add( "Python" );
data.add( "R" );
data.add( "sql" );
// Create a Unmodifiable sorted set
SortedSet<String> data2
= Collections.unmodifiableSortedSet(data);
// display
System.out.println(data);
// add to data
data.add( "bigdata/iot" );
// display
System.out.println(data2);
}
} |
Output
[Python, R, java, sql] [Python, R, bigdata/iot, java, sql]
Example 2:
Java
import java.util.*;
public class GFG1 {
// main method
public static void main(String[] args)
{
// create a set named data
SortedSet<Integer> data = new TreeSet<Integer>();
// Add values in the data
data.add( 1 );
data.add( 2 );
data.add( 3 );
data.add( 34 );
// Create a Unmodifiable sorted set
SortedSet<Integer> data2
= Collections.unmodifiableSortedSet(data);
// display
System.out.println(data);
// add to data
data.add( 32 );
// display
System.out.println(data2);
}
} |
Output
[1, 2, 3, 34] [1, 2, 3, 32, 34]