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 program to demonstrate // checkedSortedMap() method // for <String, String> type import 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 elemnet 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); } } } |
Sorted map: {Karan=Arjun, Karn=Veer, Ram=Gopal} Typesafe view of sorted map: {Karan=Arjun, Karn=Veer, Ram=Gopal}
Example 2:
// Java program to demonstrate // checkedSortedMap() method // for <String, Integer> type import 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 elemnet 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); } } } |
Sorted map: {Karan=39, Karn=40, Ram=20} Typesafe view of sorted map: {Karan=39, Karn=40, Ram=20}
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