Collections checkedSortedMap() method in Java with Examples
The checkedSortedMap() method of java.util.Collections class is used to return a dynamically typesafe view of the specified sorted map.
The returned map will be serializable if the specified map is serializable.
Since null is considered to be a value of any reference type, the returned map permits insertion of null keys or values whenever the backing map does.
Syntax:
public static SortedMap checkedSortedMap(SortedMap m, Class keyType, Class valueType)
Parameters: This method takes the following argument as a parameter
- m – the map for which a dynamically typesafe view is to be returned
- keyType – the type of key that m is permitted to hold
- valueType – the type of value that m is permitted to hold
Return Value: This method returns a dynamically typesafe view of the specified map.
Below are the examples to illustrate the checkedSortedMap() method
Example 1:
Java
// Java program to demonstrate// checkedSortedMap() method// for <String, String> typeimport java.util.*;public class GFG1 { public static void main(String[] argv) throws Exception { try { // creating object of SortedMap<String, String> SortedMap<String, String> smap = new TreeMap<String, String>(); // Adding element to smap smap.put("Ram", "Gopal"); smap.put("Karan", "Arjun"); smap.put("Karn", "Veer"); // printing the sorted map System.out.println("Sorted map:\n" + smap); // create typesafe view of the specified map SortedMap<String, String> tsmap = Collections .checkedSortedMap(smap,<strong>Output:</strong><pre>{Karan=39, Karn=40, Ram=20}</pre> String.class, String.class); // printing the typesafe view of specified sorted map System.out.println("Typesafe view of sorted map:\n" + tsmap); } catch (IllegalArgumentException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
Sorted map:
{Karan=Arjun, Karn=Veer, Ram=Gopal}
Typesafe view of sorted map:
{Karan=Arjun, Karn=Veer, Ram=Gopal}
Example 2:
Java
// Java program to demonstrate// checkedSortedMap() method// for <String, Integer> typeimport java.util.*;public class GFG1 { public static void main(String[] argv) throws Exception { try { // creating object of SortedMap<String, Integer> SortedMap<String, Integer> smap = new TreeMap<String, Integer>(); // Adding element to smap smap.put("Ram", 20); smap.put("Karan", 39); smap.put("Karn", 40); // printing the sorted map System.out.println("Sorted map:\n" + smap); // create typesafe view of the specified map SortedMap<String, Integer> tsmap = Collections .checkedSortedMap(smap, String.class, Integer.class); // printing the typesafe view of specified sorted map System.out.println("Typesafe view of sorted map:\n" + tsmap); } catch (IllegalArgumentException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
Sorted map:
{Karan=39, Karn=40, Ram=20}
Typesafe view of sorted map:
{Karan=39, Karn=40, Ram=20}
