- Java.util Package Classes
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- Java.util - Random
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- Java.util - Stack
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- 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
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- Java.util - Exceptions
- Java.util - Enumerations
- Java.util Useful Resources
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- Java.util - Discussion
Java Collections unmodifiableSortedMap() Method
Description
The Java Collections unmodifiableSortedMap() method is used to return an unmodifiable view of the specified sorted map.
Declaration
Following is the declaration for java.util.Collections.unmodifiableSortedMap() method.
public static <K,V> SortedMap<K,V> unmodifiableSortedMap(SortedMap<? extends K,? extends V> m)
Parameters
m − This is the sorted map for which an unmodifiable view is to be returned.
Return Value
The method call returns an unmodifiable view of the specified sorted map.
Exception
NA
Getting Immutable SortedMap From a Mutable SortedMap of String,Integer Pair Example
The following example shows the usage of Java Collection unmodifiableSortedMap(SortedMap) method. We've created a SortedMap object of String and Integer. Few entries are added and then using unmodifiableSortedMap(SortedMap) method, we've retrieved the sorted version of sorted map and printed the sorted map.
package com.tutorialspoint; import java.util.Collections; import java.util.TreeMap; import java.util.SortedMap; public class CollectionsDemo { public static void main(String[] args) { // create map SortedMap<String,Integer> map = new TreeMap<String,Integer>(); // populate the map map.put("1",1); map.put("2",2); map.put("3",3); // create a sorted map SortedMap<String,Integer> sortedMap = Collections.unmodifiableSortedMap(map); System.out.println("Immutable Sorted map is :"+sortedMap); } }
Output
Let us compile and run the above program, this will produce the following result.
Immutable Sorted map is :{1=1, 2=2, 3=3}
Getting Immutable SortedMap From a Mutable SortedMap of String,String Pair Example
The following example shows the usage of Java Collection unmodifiableSortedMap(SortedMap) method. We've created a SortedMap object of String and String. Few entries are added and then using unmodifiableSortedMap(SortedMap) method, we've retrieved the sorted version of sorted map and printed the sorted map.
package com.tutorialspoint; import java.util.Collections; import java.util.TreeMap; import java.util.SortedMap; public class CollectionsDemo { public static void main(String[] args) { // create map SortedMap<String,String> map = new TreeMap<String,String>(); // populate the map map.put("1","TP"); map.put("2","IS"); map.put("3","BEST"); // create a sorted map SortedMap<String,String> sortedMap = Collections.unmodifiableSortedMap(map); System.out.println("Immutable Sorted map is :"+sortedMap); } }
Output
Let us compile and run the above program, this will produce the following result.
Immutable Sorted map is :{1=TP, 2=IS, 3=BEST}
Getting Immutable SortedMap From a Mutable SortedMap of String, Object Pair Example
The following example shows the usage of Java Collection unmodifiableSortedMap(SortedMap) method. We've created a SortedMap object of String and Student object. Few entries are added and then using unmodifiableSortedMap(SortedMap) method, we've retrieved the sorted version of sorted map and printed the sorted map.
package com.tutorialspoint; import java.util.Collections; import java.util.TreeMap; import java.util.SortedMap; public class CollectionsDemo { public static void main(String[] args) { // create map SortedMap<String,Student> map = new TreeMap<String,Student>(); // populate the map map.put("1",new Student(1, "Julie")); map.put("2",new Student(2, "Robert")); map.put("3",new Student(3, "Adam")); // create a sorted map SortedMap<String,Student> sortedMap = Collections.unmodifiableSortedMap(map); System.out.println("Immutable Sorted map is :"+sortedMap); } } 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.
Immutable Sorted map is :{1=[ 1, Julie ], 2=[ 2, Robert ], 3=[ 3, Adam ]}
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